Change the trigger of plot job to a timer

     - remove the trigger from post build
     - add the timer as a trigger build
     - modify the charts for timestamp

Issue-ID: CPS-1753
Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech>
Change-Id: I6013bc0c3497b18b4570b55c49887e7d2e3c9042
diff --git a/jjb/onap/cps/cps-performance-test-jobs.yaml b/jjb/onap/cps/cps-performance-test-jobs.yaml
index 2bb5245..ecbdd3c 100644
--- a/jjb/onap/cps/cps-performance-test-jobs.yaml
+++ b/jjb/onap/cps/cps-performance-test-jobs.yaml
@@ -35,14 +35,11 @@
     jobs:
       - 'onap-{project-name}-{stream}-performance-test-java'
 
-    publishers:
-        - trigger:
-              project: 'onap-cps-performance-tests-plots'
-
 - project:
     name: cps-tests-plots
     project: cps
     project-name: cps
+    timer: "15 4 * * *"
 
     jobs:
         - 'onap-{project-name}-performance-tests-plots'
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