core: deprecated config values related to MAC Pool

Config values related to MAC Pool "MaxMacsCountInPool, MacPoolRanges,
AllowDuplicateMacAddresses" were deprecated. "MaxMacsCountInPool" is
not needed at all, while "MacPoolRanges" and
"AllowDuplicateMacAddresses" is now set on each instance of MAC Pool.

Change-Id: I695923158c882d88214c09c7331d9d559ef07a6d
Signed-off-by: Martin Mucha <mmucha@redhat.com>