Added docker-compose and maestro-ng to the agent

Author: Dmitry Berezovsky

Dockerfile

@@ -43,9 +43,9 @@ ENV MAVEN_OPTS -Xmx512m -Xss256k -XX:+UseCompressedOops
 
 # ------------------------------------------------------------------------ docker
 
-RUN yum install -y docker && yum clean all
+RUN yum install -y docker python-devel gcc && yum clean all \
+    && pip install docker-compose maestro-ng
 ENV DOCKER_AVAILABLE=1
-RUN pip install docker-compose maestro-ng
 
 # ------------------------------------------------------------------------