Modify cucumber test cases so that the retry login in origin-dev-tools does not run Fedora tests on RHEL.
The core of the issue is that cucumber ignores tags when line number is specified.
The add_alias and remove_alias functions now raise on error instead of returning like a shell call.
Origin RHEL & Fedora build fixes.
Merge pull request #1641 from rmillner/test_case_fixes

Test case fixes