updated RHEL install guide to support 7.x, and fixed a few out of order steps
updated RHEL install guide to support 7.x, and fixed a few out of order steps

AllenBW/api,adderall/api,mafernando/api,boozallen/projectjellyfish,sreekantch/JellyFish,boozallen/projectjellyfish,sonejah21/api,projectjellyfish/api,boozallen/projectjellyfish,adderall/api,stackus/api,sonejah21/api,adderall/api,AllenBW/api,projectjellyfish/api,AllenBW/api,projectjellyfish/api,stackus/api,boozallen/projectjellyfish,sreekantch/JellyFish,sreekantch/JellyFish,mafernando/api,sonejah21/api,mafernando/api,stackus/api