Update Jenkinsfile to only deploy master to Maven.

Jenkinsfile

@@ -2,7 +2,11 @@ node {
   stage 'Git Clone'
   checkout scm
   stage 'Maven Compile'
-  sh 'mvn clean deploy -U'
+  if (env.BRANCH_NAME == 'master') {
+    sh 'mvn clean deploy -U'
+  } else {
+    sh 'mvn clean package -U'
+  }
   stage 'Jenkins Archive'
   step([$class: 'ArtifactArchiver', artifacts: 'target/*.jar', fingerprint: true])
 }