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/storage/netapp/na_cdot_volume.py

@@ -1,22 +1,12 @@
 #!/usr/bin/python
 
 # (c) 2017, NetApp, Inc
-#
-# 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'],
                     'supported_by': 'community'}
@@ -114,11 +104,13 @@ RETURN = """
 
 
 """
+import traceback
 
 from ansible.module_utils.basic import AnsibleModule
-from ansible.module_utils.pycompat24 import get_exception
+from ansible.module_utils._text import to_native
 import ansible.module_utils.netapp as netapp_utils
 
+
 HAS_NETAPP_LIB = netapp_utils.has_netapp_lib()
 
 
@@ -243,10 +235,9 @@ class NetAppCDOTVolume(object):
         try:
             self.server.invoke_successfully(volume_create,
                                             enable_tunneling=True)
-        except netapp_utils.zapi.NaApiError:
-            err = get_exception()
-            self.module.fail_json(msg='Error provisioning volume %s of size %s' % (self.name, self.size),
-                                  exception=str(err))
+        except netapp_utils.zapi.NaApiError as e:
+            self.module.fail_json(msg='Error provisioning volume %s of size %s: %s' % (self.name, self.size, to_native(e)),
+                                  exception=traceback.format_exc())
 
     def delete_volume(self):
         if self.is_infinite:
@@ -260,10 +251,9 @@ class NetAppCDOTVolume(object):
         try:
             self.server.invoke_successfully(volume_delete,
                                             enable_tunneling=True)
-        except netapp_utils.zapi.NaApiError:
-            err = get_exception()
-            self.module.fail_json(msg='Error deleting volume %s' % self.name,
-                                  exception=str(err))
+        except netapp_utils.zapi.NaApiError as e:
+            self.module.fail_json(msg='Error deleting volume %s: %s' % (self.name, to_native(e)),
+                                  exception=traceback.format_exc())
 
     def rename_volume(self):
         """
@@ -284,10 +274,9 @@ class NetAppCDOTVolume(object):
         try:
             self.server.invoke_successfully(volume_rename,
                                             enable_tunneling=True)
-        except netapp_utils.zapi.NaApiError:
-            err = get_exception()
-            self.module.fail_json(msg='Error renaming volume %s' % self.name,
-                                  exception=str(err))
+        except netapp_utils.zapi.NaApiError as e:
+            self.module.fail_json(msg='Error renaming volume %s: %s' % (self.name, to_native(e)),
+                                  exception=traceback.format_exc())
 
     def resize_volume(self):
         """
@@ -308,10 +297,9 @@ class NetAppCDOTVolume(object):
         try:
             self.server.invoke_successfully(volume_resize,
                                             enable_tunneling=True)
-        except netapp_utils.zapi.NaApiError:
-            err = get_exception()
-            self.module.fail_json(msg='Error re-sizing volume %s' % self.name,
-                                  exception=str(err))
+        except netapp_utils.zapi.NaApiError as e:
+            self.module.fail_json(msg='Error re-sizing volume %s: %s' % (self.name, to_native(e)),
+                                  exception=traceback.format_exc())
 
     def change_volume_state(self):
         """
@@ -346,10 +334,10 @@ class NetAppCDOTVolume(object):
         try:
             self.server.invoke_successfully(volume_change_state,
                                             enable_tunneling=True)
-        except netapp_utils.zapi.NaApiError:
-            err = get_exception()
-            self.module.fail_json(msg='Error changing the state of volume %s to %s' % (self.name, state_requested),
-                                  exception=str(err))
+        except netapp_utils.zapi.NaApiError as e:
+            self.module.fail_json(msg='Error changing the state of volume %s to %s: %s' %
+                                  (self.name, state_requested, to_native(e)),
+                                  exception=traceback.format_exc())
 
     def apply(self):
         changed = False