* do not log the login command
* change dockerhub creds
* fix reference of tag in the push images task
* add retries
* remove repository parameter
* pull fedora from docker.io
* name docker_image tasks for each kubernetes and magnum images
* drop async logs
Change-Id: Iead202bdf9d7d42d0b7e21bea73a298678be714b
Signed-off-by: Spyros Trigazis <spyridon.trigazis@cern.ch>