PHP-1259: MongoDB::listCollections() should support filter option

https://jira.mongodb.org/browse/PHP-1259
The test is basically identical to the command variant (`mongodb-listcollections-004.phpt`), except I moved the regex case to an error test since it isn't supported for the legacy variant. Naming the collection "profile" was very intentional to ensure that the criteria matched correctly (i.e. direct string match should only find "profile" and the regex match should find both).