Docs: Oat HA for rhel 7
Docs: Oat HA for rhel 7

Signed-off-by: Theresa Shan <470cb05cf677e8b3630d422f461142db707a480c@intel.com>

xe1gyq/OpenAttestation,xe1gyq/OpenAttestation,xe1gyq/OpenAttestation,xe1gyq/OpenAttestation,xe1gyq/OpenAttestation