Additional flake8 cleanup

The flake8 command was identifying several warnings and errors. This change
addresses the flake8 warnings and updates the setup.cfg with additional
exclusions. If accepted, jenkins will be updated to use the flake8 command,
rather than using the django_jenkins plugin. This will expedite jenkins
testing.

awx/plugins/callback/job_event_callback.py

@@ -36,11 +36,8 @@ import json
 import logging
 import os
 import pwd
-import sys
-import urllib
 import urlparse
 import time
-from contextlib import closing
 
 # Requests
 import requests

awx/plugins/fact_caching/tower.py

@@ -32,7 +32,6 @@
 import sys
 import time
 import datetime
-import json
 from copy import deepcopy
 from ansible import constants as C
 from ansible.cache.base import BaseCacheModule

awx/plugins/inventory/awxrest.py

@@ -4,10 +4,10 @@
 # This file is a utility script that is not part of the AWX or Ansible
 # packages.  It does not import any code from either package, nor does its
 # license apply to Ansible or AWX.
-# 
+#
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
-# 
+#
 # Redistributions of source code must retain the above copyright notice, this
 # list of conditions and the following disclaimer.
 #
@@ -61,7 +61,7 @@ class TokenAuth(requests.auth.AuthBase):
         return request
 
 class InventoryScript(object):
-    
+
     def __init__(self, **options):
         self.options = options
 
@@ -95,11 +95,11 @@ class InventoryScript(object):
     def run(self):
         try:
             self.base_url = self.options.get('base_url', '') or \
-                            os.getenv('REST_API_URL', '')
+                os.getenv('REST_API_URL', '')
             if not self.base_url:
                 raise ValueError('No REST API URL specified')
             self.auth_token = self.options.get('authtoken', '') or \
-                              os.getenv('REST_API_TOKEN', '')
+                os.getenv('REST_API_TOKEN', '')
             parts = urlparse.urlsplit(self.base_url)
             if not (parts.username and parts.password) and not self.auth_token:
                 raise ValueError('No username/password specified in REST API '
@@ -107,7 +107,7 @@ class InventoryScript(object):
             try:
                 # Command line argument takes precedence over environment
                 # variable.
-                self.inventory_id = int(self.options.get('inventory_id', 0) or \
+                self.inventory_id = int(self.options.get('inventory_id', 0) or
                                         os.getenv('INVENTORY_ID', 0))
             except ValueError:
                 raise ValueError('Inventory ID must be an integer')

awx/plugins/library/scan_services.py

@@ -84,7 +84,7 @@ class ServiceScanService(BaseService):
                     else:
                         pid = None
                 else:
-                    pid = None
+                    pid = None  # NOQA
                 payload = {"name": service_name, "state": service_state, "goal": service_goal, "source": "upstart"}
                 services.append(payload)
 
@@ -104,7 +104,7 @@ class ServiceScanService(BaseService):
                     service_state = "dead"
                 elif len(line_data) == 3:
                     service_name = line_data[0]
-                    service_pid = None
+                    service_pid = None  # NOQA
                     service_state = "stopped"
                 else:
                     continue