Added some labels to the 'associations' tests so it's easier to see what's breaking.
Made bootstrap emit 'fixture' event for now to make sure the tests clean up after themselves.  Temporarily set the fixtures in the 'n..m association:findOne.populate()' test to use migrate:drop.
Ignore 'no table' errors for calls to '.drop()' during test cleanup.  Also re-enable migrate:alter for the two naughty fixtures, which breaks the tests again.
Use drop in troublesome fixtures for now