Pipeline: use wmf base image

Authored by thcipriani on Feb 26 2019, 6:25 PM.


Pipeline: use wmf base image

Add dependencies, gcc, git, and make, needed to build and test blubber.
These added depedencies were already present in the dockerhub
golang:1.10-stretch base image, but must be installed on top of the
leaner wmf golang:1.11.5-1 base image.

Change-Id: I75a3263b2e4635ed21a393531d901dcb9620453a