adding gitlab-ci with emam-ros-carla-bridge

.gitignore

+target/

.gitlab-ci.yml

+stages:
+        - build
+
+buildLinux:
+        stage: build
+        image: registry.git.rwth-aachen.de/monticore/embeddedmontiarc/applications/carlacomponents/emam-carla-ros-bridge
+        script:
+                - mvn -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=warn -B clean install --settings settings.xml -U
+
+