Get rid of more wildcard imports and add boilerplate to more modules

This commit cleans up the following module categories:
* messaging
* inventory
* crypto
* commands
* clustering
* cloud/webfaction
* cloud/docker
* cloud/digital_ocean

lib/ansible/modules/clustering/consul_acl.py

@@ -1,21 +1,11 @@
 #!/usr/bin/python
 #
 # (c) 2015, Steve Gargan <steve.gargan@gmail.com>
-#
-# This file is part of Ansible
-#
-# Ansible is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# Ansible is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
 
 ANSIBLE_METADATA = {'metadata_version': '1.0',
                     'status': ['preview'],
@@ -123,8 +113,6 @@ EXAMPLES = '''
         state: absent
 '''
 
-import sys
-
 try:
     import consul
     from requests.exceptions import ConnectionError
@@ -138,8 +126,6 @@ try:
 except ImportError:
     pyhcl_installed = False
 
-from requests.exceptions import ConnectionError
-
 from ansible.module_utils.basic import AnsibleModule
 from ansible.module_utils._text import to_bytes
 
@@ -157,7 +143,6 @@ def execute(module):
 def update_acl(module):
 
     rules = module.params.get('rules')
-    state = module.params.get('state')
     token = module.params.get('token')
     token_type = module.params.get('token_type')
     mgmt = module.params.get('mgmt_token')
@@ -204,7 +189,6 @@ def update_acl(module):
 
 
 def remove_acl(module):
-    state = module.params.get('state')
     token = module.params.get('token')
     mgmt = module.params.get('mgmt_token')