Corrects MapR distro selection for RHEL
Corrects MapR distro selection for RHEL

Change-Id: If44adac934b3225090a0e93ee5ca005c0283fa4c
Closes-Bug: 1584780

openstack/sahara,egafford/sahara,openstack/sahara,tellesnobrega/sahara,tellesnobrega/sahara,egafford/sahara