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/cloud/smartos/imgadm.py

@@ -2,22 +2,11 @@
 # -*- coding: utf-8 -*-
 
 # (c) 2016, 2017 Jasper Lievisse Adriaanse <j@jasper.la>
-#
-# 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'],
@@ -124,9 +113,10 @@ state:
     sample: 'present'
 '''
 
-from ansible.module_utils.basic import AnsibleModule
 import re
 
+from ansible.module_utils.basic import AnsibleModule
+
 # Shortcut for the imgadm(1M) command. While imgadm(1M) supports a
 # -E option to return any errors in JSON, the generated JSON does not play well
 # with the JSON parsers of Python. The returned message contains '\n' as part of