Remove wildcard imports

Made the following changes:

* Removed wildcard imports
* Replaced long form of GPL header with short form
* Removed get_exception usage
* Added from __future__ boilerplate
  * Adjust division operator to // where necessary

For the following files:

* web_infrastructure modules
* system modules
* linode, lxc, lxd, atomic, cloudscale, dimensiondata, ovh, packet,
  profitbricks, pubnub, smartos, softlayer, univention modules
* compat dirs (disabled as its used intentionally)

lib/ansible/modules/remote_management/foreman/katello.py

@@ -1,21 +1,11 @@
 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 # (c) 2016, Eric D Helms <ericdhelms@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'],
@@ -139,6 +129,8 @@ EXAMPLES = '''
 RETURN = '''# '''
 
 import datetime
+import os
+import traceback
 
 try:
     from nailgun import entities, entity_fields, entity_mixins
@@ -147,6 +139,9 @@ try:
 except:
     HAS_NAILGUN_PACKAGE = False
 
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils._text import to_native
+
 
 class NailGun(object):
     def __init__(self, server, entities, module):
@@ -242,13 +237,13 @@ class NailGun(object):
                 files={'content': content}
             )
             return True
-        except Exception:
-            e = get_exception()
+        except Exception as e:
 
             if "Import is the same as existing data" in e.message:
                 return False
             else:
-                self._module.fail_json(msg="Manifest import failed with %s" % e)
+                self._module.fail_json(msg="Manifest import failed with %s" % to_native(e),
+                                       exception=traceback.format_exc())
 
     def product(self, params):
         org = self.find_organization(params['organization'])
@@ -519,8 +514,6 @@ def main():
 
     module.exit_json(changed=result, result="%s updated" % entity)
 
-# import module snippets
-from ansible.module_utils.basic import *
 
 if __name__ == '__main__':
     main()