Fix for BUG 410

Ensure lower case alpha hex representation is included in MAC
regex match in all cases.

Change-Id: Ic2da17146cf8f9325cc5d951f70d614ec61762a0
(cherry picked from commit ef41cf35255cddfdd8d732471c13a7462ecd2018)

Change-Id: I404130f2240fc061c87ad4d21bc051abedff2bd0
Signed-off-by: Ryan Moats <rmoats@us.ibm.com>