Restore RSpec2 support
Restore RSpec2 support

It seems simple to restore support for RSpec 2 without messing up the
matcher code too much.

Change-Id: I283cb3c84e9b03bf84d7c9414a054d9e3f95f66b
Reviewed-on: http://gerrit.causes.com/45260
Reviewed-by: Joe Lencioni <1dd72cf724deaab5db236f616560fc7067b734e1@brigade.com>
Tested-by: Joe Lencioni <1dd72cf724deaab5db236f616560fc7067b734e1@brigade.com>

500friends/db-query-matchers