[clean] allowed_statuses_controller.rb

[clean][verified] fix tiny bug in comments

If there is a duplicate comment, the view just gets a NPE and doesn't know what
to do. This commit attempts to fix this by better handling this case.

[clean] component, errata_check

[clean] package_rel, manual, errata, component, read_only, rel, search

[clean]

COntinuing refactoring on method update
Merge branch 'master' of github.com:liweinan/ett into bz_bug_refactoring

Conflicts:
	app/views/packages/workload.html.erb
Refactoring ETT code: moving things from controller to model
Merge branch 'master' of github.com:liweinan/ett into ett_refactor

Conflicts:
	app/views/packages/show.html.erb
Final commit(s) before deploying this code to server

Mostly improvements in Bugzilla stuff. Everything related to bugzilla should be
more uniform and DRY now. No more duplication on how ETT determines if a
bugzilla is an upgrade bz or not.
Merge branch 'master' of github.com:liweinan/ett into ett_refactor

Conflicts:
	app/controllers/packages_controller.rb
Merge pull request #111 from thescouser89/ett_refactor

Ett refactor