delay_after set to an integer

playbooks/library/wait_for

@@ -60,6 +60,13 @@ options:
         poll for the port being open or closed.
     choices: [ "started", "stopped" ]
     default: "started"
+  delay_after:
+    version_added: "1.4"
+    description:
+      - number of seconds to wait after the poll
+    required: false
+    default: 0
+
 notes: []
 requirements: []
 author: Jeroen Hoekx
@@ -80,7 +87,7 @@ def main():
             delay=dict(default=0),
             port=dict(required=True),
             state=dict(default='started', choices=['started', 'stopped']),
-            delay_after=dict(default=None),
+            delay_after=dict(default=0),
         ),
     )
 
@@ -92,7 +99,7 @@ def main():
     delay = int(params['delay'])
     port = int(params['port'])
     state = params['state']
-    delay_after = params['delay_after']
+    delay_after = int(params['delay_after'])
 
     start = datetime.datetime.now()