Turning on "batch mode" and "quite mode" for the Docker mvn command.
The logs in Travis CI was outgrowing the allowed maximum. This should
make the build a lot more quiet, I hope.
diff --git a/Dockerfile b/Dockerfile
index cd366e1..40b8c2c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,6 +24,6 @@
COPY . /usr/src/app
WORKDIR /usr/src/app
-RUN mvn clean install -Pdockerbuild -DskipTests
+RUN mvn -B -q clean install -Pdockerbuild -DskipTests
CMD java -server -jar undertow/target/membrane-undertow-server.jar
