Adding documentations for the Jenkins file

Change-Id: I2ff71c4a787901b80401bb53117572f9c58ef6d0
diff --git a/TestON/JenkinsFile/JenkinsfileTrigger b/TestON/JenkinsFile/JenkinsfileTrigger
index 6625355..2523a1c 100644
--- a/TestON/JenkinsFile/JenkinsfileTrigger
+++ b/TestON/JenkinsFile/JenkinsfileTrigger
@@ -1,9 +1,35 @@
+// Copyright 2017 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>,
+// or the System Testing Guide page at <https://wiki.onosproject.org/x/WYQg>
+//
+//     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.
+//
+//     TestON is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with TestON.  If not, see <http://www.gnu.org/licenses/>.
+
+// This is the Jenkins script for all-pipeline-trigger
+
 #!groovy
+
+// read the dependency functions
 funcs = evaluate readTrusted( 'TestON/JenkinsFile/dependencies/JenkinsCommonFuncs.groovy' )
 
+// get current time and send the notification of starting the test.
 def now = funcs.getCurrentTime()
 print now.toString()
 today = now[ Calendar.DAY_OF_WEEK ]
+
+// read the passed parameters from the Jenkins.
 machines = params.machines
 manually_run = params.manual_run
 if( !manually_run ){
@@ -13,17 +39,20 @@
                         + "\n:sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles::sparkles:" )
 }
 
+// store the list of the machines into the dictionary.
 machineList = machines.tokenize( "\n;, " )
 machineOn = [:]
 
+// save the triggering job function as a dictionary.
 for (machine in machineList){
     print( machine )
     machineOn[ machine ] = triggerJob( machine )
 }
 
+// run the triggering jobs concurrently.
 parallel machineOn
 
-
+// function that will trigger the specific jobs from current pipeline.
 def triggerJob( on ){
     return{
         jobToRun = on + "-pipeline-trigger"