travis: Update docker login
travis: Update docker login

Signed-off-by: Luis Pabón <faea5242a00c52da62a0f00df168c199b7ab748d@portworx.com>

pault84/openstorage,libopenstorage/openstorage,pault84/openstorage,libopenstorage/openstorage,libopenstorage/openstorage,pault84/openstorage