Loosen the check for RHEL-6 update numbers.
Loosen the check for RHEL-6 update numbers.

We have never had a case where a RHEL minor update has
broken the installer.  Thus, we can afford to accept any
version number within a major RHEL version.  This will make
it so that we don't have to release a new version of Oz
for every minor RHEL/CentOS update

Signed-off-by: Chris Lalancette <281cd07d7578d97c83271fbbf2faddb83ab3791c@gmail.com>

cernops/oz,nullr0ute/oz,nullr0ute/oz,imcleod/oz,NeilBryant/oz,imcleod/oz,NeilBryant/oz,moofrank/oz,moofrank/oz,clalancette/oz,mgagne/oz,cernops/oz,ndonegan/oz,ndonegan/oz,clalancette/oz,mgagne/oz