push: Use DockerHub for release and dev images

Author: bzub

.travis.yml

@@ -16,7 +16,6 @@ env:
     - REPO=cloudnativelabs/kube-router
     - REPO_PATH=$HOME/gopath/src/github.com/$REPO
     - GIT_BRANCH=$TRAVIS_BRANCH
-    - IMG_FQDN=quay.io
 
 script:
   # All successfully built commits get an image placed in the kube-router-git