make: release build is not aware of BUILD_ARGUMENTS

[tiborsimko]

Setting BUILD_ARGUMENTS works for developer-oriented builds, such as:

$ DEMO=r-d-r-roofit EXCLUDE_COMPONENTS=r-ui,r-m-broker BUILD_ARGUMENTS="COMPUTE_BACKENDS=htcondorcern,slurmcern,kubernetes" make ci

However it does not work for release builds, so images such as reanahub/reana-job-controller-htcondorcern-slurmcern:0.6.0-31-g35c4fc8 are not having Condor installed.

Three solutions:

• manually, as a quick fix, one can do reana-dev docker-build -c r-j-controller -b COMPUTE_BACKENDS=htcondorcern,slurmcern,kubernetes and push this image over the created one;

• one permanent solution would be to improve Makefile to make it aware of BUILD_ARGUMENTS to make the fix permanent;

• the other permanent solution would be to address this as part of #304.

[tiborsimko]

The build arguments have been moved to shell scripts. What remains to be done is the naming of the docker image. This is related to issues #370 and #363. I'll add a comment there and close the issue here.