[CI] Run pipeline on daily basis if master branch (#49)

Author: v1v

.ci/Jenkinsfile

@@ -21,6 +21,8 @@ pipeline {
   }
   triggers {
     issueCommentTrigger('(?i).*jenkins\\W+run\\W+(?:the\\W+)?tests(?:\\W+please)?.*')
+    // Only master branch will run on a timer basis
+    cron(env.BRANCH_NAME == 'master' ? '@daily' : '')
   }
   stages {
     stage('Checkout') {
@@ -97,4 +99,4 @@ def python(Map v = [:], body) {
       body()
     }
   }
-}
+}