Added basic Jenkins pipeline

Jenkinsfile

@@ -0,0 +1,20 @@
+node {
+    try {
+        lock(resource: "sap-jenkins-library/10", inversePrecedence: true) {
+            milestone 10
+            deleteDir()
+            stage ('Checkout'){
+                checkout scm
+            }
+            stage ('Test') {
+                sh "mvn clean test --batch-mode"
+            }
+        }
+    } catch (Throwable err) {
+        echo "Error occured: ${err}"
+        currentBuild.result = 'FAILURE'
+        throw err
+    } finally {
+            mail subject: '[Build failed] SAP/jenkins-library', body: '', to: 'k.arnold@sap.com,marcus.holl@sap.com,oliver.nocon@sap.com'
+    }
+}