Added Jenkins file

Jenkinsfile

@@ -0,0 +1,22 @@
+node {
+
+   stage('SCM') {
+      // git clone
+	  git 'https://github.com/GitPracticeRepo/spring-petclinic.git'
+   }
+   
+   stage ('build the packages') {
+      // mvn package
+	  sh 'mvn package'
+   }
+
+   stage('show test results') {
+       junit 'target/surefire-reports/*.xml'
+   }
+   
+   stage ('archival') {
+     // archiving artifacts
+	 archive 'target/*.jar'
+   }
+
+}