LU-278 only use the v* tag and limit the match

LU-278 only use the v* tag and limit the match

In order to allow people to create tags such as 2.0.59-1foobar,
only try to match on the v* type tags, and even then, tighten up
the match pattern (as best we can using globs) to try to limit the
number of false positives.

Signed-off-by: Brian J. Murrell <brian@whamcloud.com>
Change-Id: I2d6e422fc0c17df7eb4169efea8e3557e80b941d
Reviewed-on: http://review.whamcloud.com/517
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>
Reviewed-by: Michael MacDonald <mjmac@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>