5107R/5108R YUM updates

In preparation for SL-6.3 we just updated base-alpine.

The following update has been released:

base-alpine (5107R + 5108R):

This update contains an addition which (on Scientific Linux only) will modify the SL YUM repository files to switch from "6.2" to "6x", which always the latest availble release. On CentOS based 5107R or 5108R BlueOnyx servers this update has no effect.