code refactoring. Moved subscribe_all and unsubscribe_all to tasks
firstboot functons a little differently in RHEL6 and had to add this to check back button behaviour during register
firstboot back button functions differently after register. Incorporated changes for that and improved test to check back button
improved tests to function with RHEL6 and added more cases to check_escape_button
added the changed UI locator for proxy-button in firstboot
made a small change to existing code for the test to work efficiently
added register-with-cred to fix stage error for check_release test
removed extra line spacing
added sla-selection-table alias for automation
blockByBug for sla-table name, added code to select type of service level and waittillwindownot exists to assist slow RHEL5 tests
added assert-valid-testing-arch to skip subscribe tests for ppc and s390 archs
changed conditional statements as suggested, works fine
Merge pull request #335 from fsharath/fsharath

Sharath