SC-22994 - Refactor Jenkinsfile to make sure worker (jenkins build) pod use higher priorityClass (#150)

Author: mcoklica1

Jenkinsfile

@@ -13,10 +13,20 @@ properties(
 
 def label = "worker-${UUID.randomUUID().toString()}"
 
-podTemplate(label: label, serviceAccount: 'jenkins', namespace: 'jenkins', containers: [
-  containerTemplate(name: 'jnlp', image: 'jenkins/inbound-agent', args: '${computer.jnlpmac} ${computer.name}'),
-  containerTemplate(name: 'maven', image: 'sematext/maven:latest', command: 'cat', ttyEnabled: true, alwaysPullImage: false),
-],
+podTemplate(
+  label: label, 
+  serviceAccount: 'jenkins', 
+  namespace: 'jenkins', 
+  yaml: """
+apiVersion: v1
+kind: Pod
+spec:
+  priorityClassName: sematext-app-important
+""",
+  containers: [
+    containerTemplate(name: 'jnlp', image: 'jenkins/inbound-agent', args: '${computer.jnlpmac} ${computer.name}'),
+    containerTemplate(name: 'maven', image: 'sematext/maven:latest', command: 'cat', ttyEnabled: true, alwaysPullImage: false),
+  ],
 podRetention: never()) {
   node(label) {
     def sematextAgentJava = checkout ([