test_auth_and_roles works with the new nav menu structure

* Also tweaked the menu locators a little bit so hopefully they're easier to use
auth and roles tests use testgen and are parametrized from cfme_data

- Due to the way pytest.skip works in collection (see note in utils.testgen),
  it made sense to break these up into separate modules so testgen could do
  its job easily.
- I *think* the old configure_auth_mode in fixtures has been completely replaced
  by cfme.fixtures.configure_auth_mode...
I'm not sure where reverse_lookup and visible_pages belong...

..but I'm sure that they belong together wherever that may be
Add namespace tests and other improvements
* Extra flash function
* Refactor Tree a little bit
* Class functionality included (no tests yet)
* thanks to @psav for original namespace tests
Remove old server name test
Merge pull request #610 from jkrocil/rm-old-server-name-test

Remove old server name test
Reindent per @mfalesni suggestion
Test schedule - db backup

Remove old test
Merge pull request #605 from jkrocil/test-db-backup-schedule

Test schedule - db backup
Merge pull request #608 from weissjeffm/automate2

Add namespace tests and other improvements
Merge pull request #602 from seandst/nav-auth-fixup

Nav auth fixup
lazycache method decorator!
Merge pull request #611 from seandst/lazycache

lazycache method decorator!
This was breaking the docs :(
conf load errors downgraded to warnings

The lack of a config file can eventually trigger ImportError, which
(among other things) breaks our docs build. It's also really rude.
This is now a warning, which prints a nice error message without
breaking everything.
Merge pull request #614 from seandst/docs-fix

conf load errors downgraded to warnings
collapse db utils into a common module

- better support for using multiple dbs
- also destroying the rails model -> table name mapping (just use the table names)
wip
wip
wip