[ONOS-7039] [ONOS-7044] Fix PEP8 Warnings in TestON

Change-Id: Ied79ff9caff5487a6df50466307f757468d7ca3a
diff --git a/TestON/tests/CHOTestMonkey/dependencies/GraphHelper.py b/TestON/tests/CHOTestMonkey/dependencies/GraphHelper.py
index 8ae1ff0..f2ae618 100644
--- a/TestON/tests/CHOTestMonkey/dependencies/GraphHelper.py
+++ b/TestON/tests/CHOTestMonkey/dependencies/GraphHelper.py
@@ -1,5 +1,5 @@
 """
-Copyright 2016 Open Networking Foundation (ONF)
+Copyright 2016 Open Networking Foundation ( ONF )
 
 Please refer questions to either the onos test mailing list at <onos-test@onosproject.org>,
 the System Testing Plans and Results wiki page at <https://wiki.onosproject.org/x/voMg>,
@@ -8,7 +8,7 @@
     TestON 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 2 of the License, or
-    (at your option) any later version.
+    ( at your option ) any later version.
 
     TestON is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -18,7 +18,6 @@
     You should have received a copy of the GNU General Public License
     along with TestON.  If not, see <http://www.gnu.org/licenses/>.
 """
-
 """
 Graph algorithm implementations for CHOTestMonkey
 Author: you@onlab.us
@@ -71,14 +70,14 @@
             else:
                 key = self.DFI[ neighbor.index ]
                 if key in self.backEdges.keys():
-                    if not link in self.backEdges[ key ] and\
-                            not backwardLink in self.backEdges[ key ]:
+                    if link not in self.backEdges[ key ] and\
+                            backwardLink not in self.backEdges[ key ]:
                         self.backEdges[ key ].append( backwardLink )
                 else:
                     tempKey = self.DFI[ device.index ]
                     if tempKey in self.backEdges.keys():
-                        if not link in self.backEdges[ tempKey ] and\
-                                not backwardLink in self.backEdges[ tempKey ]:
+                        if link not in self.backEdges[ tempKey ] and\
+                                backwardLink not in self.backEdges[ tempKey ]:
                             self.backEdges[ key ] = [ backwardLink ]
                     else:
                         self.backEdges[ key ] = [ backwardLink ]