Fix dependencies for 2.11.1.
Fix lift-mongodb-record test compilation in 2.11.

There was a particularly strange ambiguous overload issue,
whose fix is equally odd, but works.
Fix lift-util test compilation in 2.11.

Between writing the 2.11 fixes and merging to master, a
PR landed that added a spec to MailerSpec; this spec was
not written to have a MatchResult as its return type, so
things blew up.