updated OstreeTests from results of bug 1152734 use of
/ostree/repo/config to use /etc/ostree/remotes.d/redhat.conf
new line
test  check_traceback_unregister blockedByBug-1170324
added a small wait because the automation was too quick
added conitional statement for old tests to skip on RHEL7 and added a happy-path test for RHEL7. Also conditional start of firstboot on RHEL7 (should be unregistered)