removed postgres installer

Jenkinsfile

@@ -0,0 +1,18 @@
+pipeline {
+    agent { label 'Ubuntu18-openjdk1.8'}
+
+    stages {
+        stage('Do nothing') {
+            steps {
+                sh '/bin/true'
+            }
+        }
+    stage('build') {
+            steps {
+                sh 'ant -version'
+                sh 'java -version'
+                sh 'mkdir ~/test_jenkins_mkdir'
+        }
+    }
+}
+}