Provide type for boolean module parameters

Instead of inserting 'True' and 'False' into Ansible's BOOLEANS
constants, designate the parameters as a 'bool' type.
ansible.module_utils.basic will downcase and handle ensuring the
variables are cast to booleans.

Change-Id: I2fc70a90df5cca76b49fc21adee59350173157d9

library/glance

@@ -222,10 +222,9 @@ def main():
             image_url=dict(required=False),
             image_container_format=dict(required=False),
             image_disk_format=dict(required=False),
-            image_is_public=dict(required=False, choices=BOOLEANS),
+            image_is_public=dict(required=False, type='bool'),
             api_version=dict(default='1', required=False, choices=['1', '2']),
-            insecure=dict(default=False, required=False,
-                          choices=BOOLEANS + ['True', 'False'])
+            insecure=dict(default=False, required=False, type='bool')
         ),
         supports_check_mode=False
     )

library/keystone

@@ -1334,7 +1334,7 @@ def main():
             insecure=dict(
                 default=False,
                 required=False,
-                choices=BOOLEANS + ['True', 'False']
+                type='bool'
             ),
             return_code=dict(
                 type='str',

library/neutron

@@ -429,8 +429,7 @@ def main():
             router_name=dict(required=False),
             external_gateway_info=dict(required=False),
             tenant_id=dict(required=False),
-            insecure=dict(default=False, required=False,
-                          choices=BOOLEANS + ['True', 'False']),
+            insecure=dict(default=False, required=False, type='bool'),
             allocation_pools=dict(required=False)
         ),
         supports_check_mode=False

library/provider_networks

@@ -220,11 +220,6 @@ class ProviderNetworksParsing(object):
 
 def main():
 
-    # Add in python True False
-    BOOLEANS.extend(['False', 'True'])
-    BOOLEANS_TRUE.append('True')
-    BOOLEANS_FALSE.append('False')
-
     module = AnsibleModule(
         argument_spec=dict(
             provider_networks=dict(
@@ -232,7 +227,7 @@ def main():
                 required=True
             ),
             is_metal=dict(
-                choices=BOOLEANS,
+                type='bool',
                 default='false'
             ),
             bind_prefix=dict(
@@ -245,12 +240,6 @@ def main():
     )
 
     try:
-        is_metal = module.params.get('is_metal')
-        if is_metal in BOOLEANS_TRUE:
-            module.params['is_metal'] = True
-        else:
-            module.params['is_metal'] = False
-
         pnp = ProviderNetworksParsing(module=module)
         pnp.load_networks(
             provider_networks=module.params.get('provider_networks'),