Update ci

.gitlab-ci.yml

 variables:
   # This will supress any download for dependencies and plugins or upload messages which would clutter the console log.
   # `showDateTime` will show the passed time in milliseconds. You need to specify `--batch-mode` to make this work.
-  MAVEN_OPTS: "-Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
+  MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
   # As of Maven 3.3.0 instead of this you may define these options in `.mvn/maven.config` so the same config is used
   # when running from the command line.
   # `installAtEnd` and `deployAtEnd`are only effective with recent version of the corresponding plugins.
@@ -9,18 +9,18 @@ variables:
 # Cache downloaded dependencies and plugins between builds.
 cache:
   paths:
-    - /root/.m2/repository/
+    - .m2/repository/
 # This will only validate and compile stuff and run e.g. maven-enforcer-plugin. 
 # Because some enforcer rules might check dependency convergence and class duplications
 # we use `test-compile` here instead of `validate`, so the correct classpath is picked up.
-validate:
+validate: &validate
   stage: build
   script:
     - 'mvn $MAVEN_CLI_OPTS test-compile'
   image: maven:3.3.9-jdk-8
 # For merge requests do not `deploy` but only run `verify`.
 # See https://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html
-verify:
+verify: &verify
   stage: test
   script:
     - 'mvn $MAVEN_CLI_OPTS verify'
@@ -35,4 +35,4 @@ deploy:
     - 'mvn $MAVEN_CLI_OPTS deploy'
   only:
     - master
-  image: maven:3.3.9-jdk-8
+  image: maven:3.3.9-jdk-8
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