Rhel7 AIO draft

Change-Id: I7bc4d6cb399c41fbb0d72d3e6dd6654a65270a25
add run-rhel7
few updates for rhel7

Change-Id: I80c9654ca60150fb53909cc951f57b1f6a2a0ef0
updates for rhel7 icehouse

Change-Id: I7446a83019513d84bfdd6c208ae2921724fc19d0
group vars need at least one item

Change-Id: Iea17271b5058b434a0e1660289cc407826035172
update to settings file for icehouse run-rhel7.sh

Change-Id: I55dc9f802ba5d5b4e8998056c4a15f2a720bbcaa