Fixed publishing of the custom image

Author: sergeipogrebnyak

.travis.yml

@@ -23,5 +23,5 @@ script:
 after_success:
   - if [ "$TRAVIS_BRANCH" == "master" ]; then
     docker login -u "$DOCKER_USERNAME" -p "$DOCKER_PASSWORD";
-    docker push sergeipogrebnyak/commandcentral:$RELEASE
+    docker push sergeipogrebnyak/commandcentral:$RELEASE;
     fi