Enforce code style for groovy files

Change-Id: I7d8bd721c0e5b744777a5ad92386d36a524f93ec
diff --git a/TestON/JenkinsFile/Overall_Graph_Generator b/TestON/JenkinsFile/Overall_Graph_Generator
index 41b1ccb..012b11d 100644
--- a/TestON/JenkinsFile/Overall_Graph_Generator
+++ b/TestON/JenkinsFile/Overall_Graph_Generator
@@ -36,7 +36,7 @@
 funcs.initializeTrend( "VM" )
 
 onos_branch = params.ONOSbranch
-AllTheTests = test_lists.getAllTheTests("")
+AllTheTests = test_lists.getAllTheTests( "" )
 
 // generate the graph and post the result on TestStation-VMs. Right now, all the pie and histograms are saved
 // on VM.