Modified per @bcoca

Removed try/except raises
Modified wait_for_task
Added api exception error message

lib/ansible/module_utils/vmware.py

-#!/bin/python
 # -*- coding: utf-8 -*-
 
 # (c) 2015, Joseph Callen <jcallen () csc.com>
@@ -35,49 +34,24 @@ class TaskError(Exception):
     pass
 
 
-def task_success(task):
-    return True
-
-
-def task_running(task):
-    time.sleep(15)
-    return False
-
-
-def task_error(task):
-
-    try:
-        raise TaskError(task.info.error)
-    except AttributeError:
-        raise TaskError("Unknown error has occurred")
-
-
-def task_queued(task):
-    time.sleep(15)
-    return False
-
-
 def wait_for_task(task):
 
-    task_state = {
-        vim.TaskInfo.State.success: task_success,
-        vim.TaskInfo.State.running: task_running,
-        vim.TaskInfo.State.queued: task_queued,
-        vim.TaskInfo.State.error: task_error,
-        }
-
     while True:
-        try:
-            is_finished = task_state[task.info.state](task)
-            if is_finished:
-                return True, task.info.result
-        # This exception should be handled in the module that calls this method
-        # and fail with an appropriate message to module.fail_json()
-        except TaskError:
-            raise
+        if task.info.state == vim.TaskInfo.State.success:
+            return True, task.info.result
+        if task.info.state == vim.TaskInfo.State.error
+            try:
+                raise TaskError(task.info.error)
+            except AttributeError:
+                raise TaskError("An unknown error has occurred")
+        if task.info.state == vim.TaskInfo.State.running:
+            time.sleep(15)
+        if task.info.state = vim.TaskInfo.State.queued:
+            time.sleep(15)
 
 
 def find_dvspg_by_name(dv_switch, portgroup_name):
+
     portgroups = dv_switch.portgroup
 
     for pg in portgroups:
@@ -88,59 +62,44 @@ def find_dvspg_by_name(dv_switch, portgroup_name):
 
 
 def find_cluster_by_name_datacenter(datacenter, cluster_name):
-    try:
-        host_folder = datacenter.hostFolder
-        for folder in host_folder.childEntity:
-            if folder.name == cluster_name:
-                return folder
-        return None
-    # This exception should be handled in the module that calls this method
-    # and fail with an appropriate message to module.fail_json()
-    except vmodl.MethodFault:
-        raise
+
+    host_folder = datacenter.hostFolder
+    for folder in host_folder.childEntity:
+        if folder.name == cluster_name:
+            return folder
+    return None
 
 
 def find_datacenter_by_name(content, datacenter_name, throw=True):
-    try:
-        datacenters = get_all_objs(content, [vim.Datacenter])
-        for dc in datacenters:
-            if dc.name == datacenter_name:
-                return dc
 
-        return None
-    # This exception should be handled in the module that calls this method
-    # and fail with an appropriate message to module.fail_json()
-    except vmodl.MethodFault:
-        raise
+    datacenters = get_all_objs(content, [vim.Datacenter])
+    for dc in datacenters:
+        if dc.name == datacenter_name:
+            return dc
+
+    return None
 
 
 def find_dvs_by_name(content, switch_name):
-    try:
-        vmware_distributed_switches = get_all_objs(content, [vim.dvs.VmwareDistributedVirtualSwitch])
-        for dvs in vmware_distributed_switches:
-            if dvs.name == switch_name:
-                return dvs
-        return None
-    # This exception should be handled in the module that calls this method
-    # and fail with an appropriate message to module.fail_json()
-    except vmodl.MethodFault:
-        raise
+
+    vmware_distributed_switches = get_all_objs(content, [vim.dvs.VmwareDistributedVirtualSwitch])
+    for dvs in vmware_distributed_switches:
+        if dvs.name == switch_name:
+            return dvs
+    return None
 
 
 def find_hostsystem_by_name(content, hostname):
-    try:
-        host_system = get_all_objs(content, [vim.HostSystem])
-        for host in host_system:
-            if host.name == hostname:
-                return host
-        return None
-    # This exception should be handled in the module that calls this method
-    # and fail with an appropriate message to module.fail_json()
-    except vmodl.MethodFault:
-        raise
+
+    host_system = get_all_objs(content, [vim.HostSystem])
+    for host in host_system:
+        if host.name == hostname:
+            return host
+    return None
 
 
 def vmware_argument_spec():
+
     return dict(
         hostname=dict(type='str', required=True),
         username=dict(type='str', aliases=['user', 'admin'], required=True),
@@ -149,6 +108,7 @@ def vmware_argument_spec():
 
 
 def connect_to_api(module, disconnect_atexit=True):
+
     hostname = module.params['hostname']
     username = module.params['username']
     password = module.params['password']
@@ -163,19 +123,15 @@ def connect_to_api(module, disconnect_atexit=True):
             atexit.register(connect.Disconnect, service_instance)
         return service_instance.RetrieveContent()
     except vim.fault.InvalidLogin as invalid_login:
-        module.fail_json(msg=invalid_login.msg)
-    except requests.ConnectionError:
-        module.fail_json(msg="Unable to connect to vCenter or ESXi API on TCP/443.")
+        module.fail_json(msg=invalid_login.msg, apierror=str(invalid_login))
+    except requests.ConnectionError as connection_error:
+        module.fail_json(msg="Unable to connect to vCenter or ESXi API on TCP/443.", apierror=str(connection_error))
 
 
 def get_all_objs(content, vimtype):
-    try:
-        obj = {}
-        container = content.viewManager.CreateContainerView(content.rootFolder, vimtype, True)
-        for managed_object_ref in container.view:
-            obj.update({managed_object_ref: managed_object_ref.name})
-        return obj
-    # This exception should be handled in the module that calls this method
-    # and fail with an appropriate message to module.fail_json()
-    except vmodl.MethodFault:
-        raise
\ No newline at end of file
+
+    obj = {}
+    container = content.viewManager.CreateContainerView(content.rootFolder, vimtype, True)
+    for managed_object_ref in container.view:
+        obj.update({managed_object_ref: managed_object_ref.name})
+    return obj