6c7f7de55f
Upstream stopped running make generate in order to fix their static file
builds [0]. Our static file builds have stopped working with our bump to
1.11.3. Apply the corresponding fix to our dockerfile.
Note that we also use clean-all instead of clean to be sure we clean all
the js and css files first.
[0] 48be1889cd (diff-3254677a7917c6c01f55212f86c57fbf)
Change-Id: I40f0449ae29e185ba7082f2f5a27dc96acf58e31