LU-4321 build: Remove make_META.pl

LU-4321 build: Remove make_META.pl

This patch is a first pass at cleaning up version_tag.pl.

Primarily, it removes the strange "make_META.pl" symlink behavior.  It
is not at all clear to me why the symlink was being generated on the fly,
and then version_tag.pl changed its behavior based on its name.  Odd.

Instead version_tag.pl now take "--make_META" as the first option on
its command line.

Further, we haven't use CVS in a long time, so this patch removes
the cvs-related file and checks.

The is_git and is_cvs variables weren't even used, so those are removed
as well.

Change-Id: I651234bdf1d2d32db16151f332f2b3785ee123a0
Signed-off-by: Christopher J. Morrone <morrone2@llnl.gov>
Reviewed-on: http://review.whamcloud.com/8427
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: Minh Diep <minh.diep@intel.com>
Reviewed-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>