Add boolean parameter to the trigger

Change-Id: I4b95e46a79376a7c3494e3c15d3bfc1265924feb
diff --git a/jjb/OnosSystemTest/onos-test-pipeline.yaml b/jjb/OnosSystemTest/onos-test-pipeline.yaml
index fe0f579..64712a7 100644
--- a/jjb/OnosSystemTest/onos-test-pipeline.yaml
+++ b/jjb/OnosSystemTest/onos-test-pipeline.yaml
@@ -61,6 +61,12 @@
 
     parameters:
 
+      - bool:
+         name: manual_run
+         default: false
+         description: |
+                       Check this option if you are manually running this job (you most likely are). <br />
+
       - text:
          name: machines
          default: |