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/pacemaker_cluster.py

@@ -2,19 +2,11 @@
 #coding: utf-8 -*-
 
 # (c) 2016, Mathieu Bultel <mbultel@redhat.com>
-#
-# This module 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.
-#
-# This software 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 this software.  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'],
@@ -83,7 +75,9 @@ rc:
 '''
 
 import time
-from distutils.version import StrictVersion
+
+from ansible.module_utils.basic import AnsibleModule
+
 
 _PCS_CLUSTER_DOWN="Error: cluster is not currently running on this node"
 
@@ -229,6 +223,6 @@ def main():
         module.exit_json(changed=True,
                  out=cluster_state)
 
-from ansible.module_utils.basic import AnsibleModule
+
 if __name__ == '__main__':
     main()