Updates for pep-8 compliance. Changed many files cosmetically

Added a file exclusion to tox.ini, and also excluded rule for
unused named variables.

excluded more things that are system or tox related.

Change-Id: I022b72cbe048e3fe1f70e6017038248e6a2e9538

shipyard_airflow/plugins/openstack_operators.py

@@ -14,26 +14,27 @@
 
 import logging
 import subprocess
-import sys
-import os
 
 from airflow.exceptions import AirflowException
 from airflow.models import BaseOperator
 from airflow.plugins_manager import AirflowPlugin
 from airflow.utils.decorators import apply_defaults
 
+
 class OpenStackOperator(BaseOperator):
     """
     Performs OpenStack CLI calls
     :openrc_file: Path of the openrc file
     :openstack_command: The OpenStack command to be executed
     """
+
     @apply_defaults
     def __init__(self,
                  openrc_file,
                  openstack_command=None,
                  xcom_push=False,
-                 *args, **kwargs):
+                 *args,
+                 **kwargs):
 
         super(OpenStackOperator, self).__init__(*args, **kwargs)
         self.openrc_file = openrc_file
@@ -44,13 +45,17 @@ class OpenStackOperator(BaseOperator):
         logging.info("Running OpenStack Command: %s", self.openstack_command)
 
         # Emulate "source" in bash. Sets up environment variables.
-        pipe = subprocess.Popen(". %s; env" % self.openrc_file, stdout=subprocess.PIPE, shell=True)
+        pipe = subprocess.Popen(
+            ". %s; env" % self.openrc_file, stdout=subprocess.PIPE, shell=True)
         data = pipe.communicate()[0]
         os_env = dict((line.split("=", 1) for line in data.splitlines()))
- 
-        # Execute the OpenStack CLI Command
-        openstack_cli = subprocess.Popen(self.openstack_command, env=os_env, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
 
+        # Execute the OpenStack CLI Command
+        openstack_cli = subprocess.Popen(
+            self.openstack_command,
+            env=os_env,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT)
 
         # Logs Output
         logging.info("Output:")
@@ -60,18 +65,15 @@ class OpenStackOperator(BaseOperator):
             line = line.strip()
             logging.info(line)
 
-
-        # Wait for child process to terminate. Set and return returncode attribute.
+        # Wait for child process to terminate.
+        # Set and return returncode attribute.
         openstack_cli.wait()
         logging.info("Command exited with "
                      "return code {0}".format(openstack_cli.returncode))
 
-
         # Raise Execptions if OpenStack Command Fails
         if openstack_cli.returncode:
             raise AirflowException("OpenStack Command Failed")
-
-
         """
         Push response to an XCom if xcom_push is True
         """
@@ -82,4 +84,3 @@ class OpenStackOperator(BaseOperator):
 class OpenStackCliPlugin(AirflowPlugin):
     name = "openstack_cli_plugin"
     operators = [OpenStackOperator]
-