Tidy up validate-modules ignores for rackspace modules (#1242)

* fixed validation-modules for plugins/doc_fragments/rackspace.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_cbs.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_cbs_attachments.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_cdb_database.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_cdb.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_cdb_user.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_clb_nodes.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_clb.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_clb_ssl.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_dns.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_dns_record.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_facts.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_files.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_files_objects.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_identity.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_keypair.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_meta.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_mon_alarm.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_mon_check.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_mon_entity.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_mon_notification_plan.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_mon_notification.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_network.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_queue.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_scaling_group.py

* fixed validation-modules for plugins/modules/cloud/rackspace/rax_scaling_policy.py

* Enabling validation-modules for rackspace modules

* Removed test in rax.py

* Added markup to items in list

* rax_monm_check.py: moved choices doc to description for check_type

As the argument_spec does not contain the "choices" spec, adjusting that in the docs

* rax_monm_check.py: a number of things missing in docs, fixed

plugins/doc_fragments/rackspace.py

@@ -32,7 +32,6 @@ options:
     description:
       - Region to create an instance in.
     type: str
-    default: DFW
   username:
     description:
       - Rackspace username, overrides I(credentials).
@@ -59,37 +58,45 @@ notes:
     OPENSTACK = r'''
 options:
   api_key:
+    type: str
     description:
       - Rackspace API key, overrides I(credentials).
     aliases: [ password ]
   auth_endpoint:
+    type: str
     description:
       - The URI of the authentication service.
-    default: https://identity.api.rackspacecloud.com/v2.0/
+      - If not specified will be set to U(https://identity.api.rackspacecloud.com/v2.0/)
   credentials:
+    type: path
     description:
       - File to find the Rackspace credentials in. Ignored if I(api_key) and
         I(username) are provided.
     aliases: [ creds_file ]
   env:
+    type: str
     description:
       - Environment as configured in I(~/.pyrax.cfg),
         see U(https://github.com/rackspace/pyrax/blob/master/docs/getting_started.md#pyrax-configuration).
   identity_type:
+    type: str
     description:
       - Authentication mechanism to use, such as rackspace or keystone.
     default: rackspace
   region:
+    type: str
     description:
       - Region to create an instance in.
-    default: DFW
   tenant_id:
+    type: str
     description:
       - The tenant ID used for authentication.
   tenant_name:
+    type: str
     description:
       - The tenant name used for authentication.
   username:
+    type: str
     description:
       - Rackspace username, overrides I(credentials).
   validate_certs: