Revert "Temporarily ignore request specs in Travis"

This reverts commit a424c3917c4511465e5b8b88da704bf4257e8485.
Revert "Temporarily ignore content-owner specs in Travis"

This reverts commit 268385a5c8b23427cecdf02b3df2f1e50348a2b3.
Don’t try to search claims for unknown videos

Supposedly YouTube API should return "No Items" or at most a "Not Found"
error when the filters for claimSearch do not match any video. Instead,
YouTube API raises a 500 error without explanation.

For now, this case is very specific and not needed, so it can be removed.
Merge pull request #63 from Fullscreen/fix-travis-tests

Fix travis tests