Revert changes to moxi and memcached repos

Change-Id: Ib77d934fa94e108bf9b3e5470d424b2e314f2f33
Reviewed-on: http://review.couchbase.org/40586
Reviewed-by: Sriram Ganesan <sriram@couchbase.com>
Tested-by: Sriram Ganesan <sriram@couchbase.com>