Added Mongo functional tests with identified fixes.

[iisisrael]

Functional tests for ODM revealed bug in auth code and token manager result count return. Additional environment configuration also revealed that the BootTest had so far been giving a false positives, as the test environment wasn't actually being changed.

Deprecation messages around php-mock/php-mock-phpunit are not yet resolved in that package, but are so far inconsequential.

[iisisrael]

Also restored the void return in the OAuthListener when the bearer token is not found. This is the expected behavior, and an exception is not necessary. Since no token or response is set on the event as a result of any authentication attempt, Symfony will respond with an AuthenticationCredentialsNotFoundException.