updated build

.gitlab-ci.yml

@@ -2,13 +2,22 @@ stages:
   - test
   - sonar
 
+variables:
+  MAVEN_OPTS: "-Dhttps.protocols=TLSv1.2 -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"
+  MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true"
+
+cache:
+  key: "$CI_JOB_NAME"  
+  paths:
+    - .m2/repository
+
 test:
   stage: test
-  script: mvn clean verify
+  script: mvn $MAVEN_CLI_OPTS clean verify
 
 sonar:
   stage: sonar
   script: 
-  - mvn clean verify sonar:sonar --settings settings.xml   
+  - mvn $MAVEN_CLI_OPTS clean verify sonar:sonar --settings settings.xml   
   only:
   - master