fix gitlab CI

Author: t-oster

.gitlab-ci.yml

@@ -1,16 +1,21 @@
-image: java:8
-
-before_script:
-  - apt-get update -y
-  - apt-get install -y ant
+image: maven:latest
 
+variables:
+  MAVEN_CLI_OPTS: "--batch-mode"
+  MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository"
 
+cache:
+  paths:
+    - .m2/repository/
+    - target/
 
 build:
+  stage: build
   script:
-    - ./test.sh
-    - ant jar
+    - mvn $MAVEN_CLI_OPTS compile
 
 test:
+  stage: test
   script:
-    - ant test
+    - ./test.sh
+    - mvn $MAVEN_CLI_OPTS test