Move execution of gatling test to 17:15 UTC

Change-Id: I3b8b3b42a148a5248a20e0e98351caf242a41eae
diff --git a/jenkins/gatlingTestPipeline.yaml b/jenkins/gatlingTestPipeline.yaml
index 21fd1de..c576b82 100644
--- a/jenkins/gatlingTestPipeline.yaml
+++ b/jenkins/gatlingTestPipeline.yaml
@@ -9,4 +9,4 @@
             - master
     dsl: !include-raw: gatlingTestPipeline.groovy
     triggers:
-      - timed: "@midnight"
+      - timed: 'H/15 17 * * *'