[devtools] deprecate usage of sources file for test This is old support which clutters the code and should no more be used. As this is rarely used (if it is) and test only, it feels ok to drop support at once without a deprecation phase.

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usr/bin/cubicweb-ctl usr/bin/

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usr/lib/python2*/*-packages/cubicweb/cwctl.py

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../cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl