cloudstack: refactor get_result()

* A commen dict of keys has been defined, which we look in results returned from the API.
* self.returns dict can be use in subclass to extend this dict.
* Optionally the key name can be replaced with a new key name, often used to make the return keys identical to the arguments passed.
* Use new style class

lib/ansible/module_utils/cloudstack.py

@@ -35,7 +35,7 @@ except ImportError:
     has_lib_cs = False
 
 
-class AnsibleCloudStack:
+class AnsibleCloudStack(object):
 
     def __init__(self, module):
         if not has_lib_cs:
@@ -45,6 +45,22 @@ class AnsibleCloudStack:
             'changed': False,
         }
 
+        # Common returns, will be merged with self.returns
+        # search_for_key: replace_with_key
+        self.common_returns = {
+            'id':       'id',
+            'name':     'name',
+            'created':  'created',
+            'zonename': 'zone',
+            'state':    'state',
+            'project':  'project',
+            'account':  'account',
+            'domain':   'domain',
+        }
+
+        # Init returns dict for use in subclasses
+        self.returns = {}
+
         self.module = module
         self._connect()
 
@@ -370,14 +386,18 @@ class AnsibleCloudStack:
 
     def get_result(self, resource):
         if resource:
-            if 'id' in resource:
-                self.result['id'] = resource['id']
-            if 'project' in resource:
-                self.result['project'] = resource['project']
-            if 'domain' in resource:
-                self.result['domain'] = resource['domain']
-            if 'account' in resource:
-                self.result['account'] = resource['account']
-            if 'zonename' in resource:
-                self.result['zone'] = resource['zonename']
+            returns = self.common_returns.copy()
+            returns.update(self.returns)
+            for search_key, return_key in returns.iteritems():
+                if search_key in resource:
+                    self.result[return_key] = resource[search_key]
+
+            # Special handling for tags
+            if 'tags' in resource:
+                self.result['tags'] = []
+                for tag in resource['tags']:
+                    result_tag          = {}
+                    result_tag['key']   = tag['key']
+                    result_tag['value'] = tag['value']
+                    self.result['tags'].append(result_tag)
         return self.result