bug fixes

On branch centos7
Changes to be committed:

	modified:   scripts/firewalld.sh
			add echo lines to loops
	modified:   scripts/linux_update.sh
			check if git has already been configured
	modified:   scripts/middleman.sh
			add source for rvm to .bashrc
			move chown command to bottom of script so it works for git files too
	modified:   setup.sh
			fix variable name errors for trusted hosts