Remove successful login message

The message seems unnecessary and adds more clutter to the front page. The user should only be notified if something failed. Also, when creating the lti landing page, we don't want users to see that message. The transition from lms to avalon should appear more seamless.
Remove apostrophes from test names

Some of the last names in the Name Factories have apostrophes and are breaking tests randomly. I removed the apostrophes from the name. So O'Connell will be OConnell.
Merge pull request #216 from avalonmediasystem/leah-holiday-fun

Remove successful login message