Move #!groovy location to be the top of the file.

Change-Id: I93a900ff907bedd6af26cd35bbaa670714e1a372
diff --git a/TestON/JenkinsFile/Trend_Graph_Generator b/TestON/JenkinsFile/Trend_Graph_Generator
index fbdd54b..1cd34ba 100644
--- a/TestON/JenkinsFile/Trend_Graph_Generator
+++ b/TestON/JenkinsFile/Trend_Graph_Generator
@@ -1,3 +1,4 @@
+#!groovy
 // Copyright 2017 Open Networking Foundation (ONF)
 //
 // Please refer questions to either the onos test mailing list at <onos-test@onosproject.org>,
@@ -19,8 +20,6 @@
 
 // This is the Jenkins script for manual-graph-generator-trend
 
-#!groovy
-
 // read the dependency functions
 funcs = evaluate readTrusted( 'TestON/JenkinsFile/dependencies/JenkinsCommonFuncs.groovy' )
 fileRelated = evaluate readTrusted( 'TestON/JenkinsFile/dependencies/JenkinsPathAndFiles.groovy' )