Added maven_jenkins

Jenkinsfile

@@ -1,32 +1,27 @@
 pipeline {
     agent any
 
+    tools {
+        // Install the Maven version configured as "M3" and add it to the path.
+        maven "maven_jenkins"
+    }
+
     stages {
         stage ('Compile Stage') {
-
             steps {
-                withMaven(maven : 'maven_jenkins') {
                     sh 'mvn clean compile'
             }
         }
-        }
-
         stage ('Testing Stage') {
-
             steps {
-                withMaven(maven : 'maven_jenkins') {
                     sh 'mvn test'
                 }
             }
         }
-
-
         stage ('Deployment Stage') {
             steps {
-                withMaven(maven : 'maven_jenkins') {
                     sh 'mvn deploy'                
             }
         }
     }
 }
-}