[CI] silence the full user build test and only run it on cron and master

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 9b79f06..dcb613d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -78,6 +78,7 @@
       install: bash .travisCI/utils/bash_run_wrapper.sh .travisCI/utils/pdkBuild.sh
       script: bash .travisCI/dv/dv-check-wrapper.sh wb_utests 1
     - name: "The Full User Build Test"
+      if: branch = master OR type=cron
       install:
         - bash .travisCI/utils/bash_run_wrapper.sh ".travisCI/utils/pdkBuild.sh 0"
         - sh .travisCI/precheck/precheckBuild.sh