Improve cmt version detection by ignoring warning?
I've found that on some machines cmt prints a warning before the version:
$ /cvmfs/lhcb.cern.ch/lib/bin/Linux-x86_64/cmt version
#CMT---> Warning: apply_tag with empty name [$(cmt_compiler_version)]
v1r20p20090520
@clemenci Is there anything that can be done about this? or should it be ignored as I've done in this PR?