added -Dgpg.skip=true

Author: Achim Brandt

.travis.yml

@@ -4,6 +4,8 @@ before_script:
   - chmod 777 ./tests/travis/setup_arangodb.sh
   - ./tests/travis/setup_arangodb.sh
 
+install: mvn install -DskipTests=true -Dgpg.skip=true -Dmaven.javadoc.skip=true -B -V
+
 jdk:
   - oraclejdk7