phpdoc
Remove old IMP Quota drivers

There is really NO reason for anyone to use anything other than IMAP
Quotas at this point.  Not only are most of these drivers unmaintained,
but they are slllooooowwww, have complex setups, require advanced PHP
features, and are not guaranteed to work with the current code.

Simply put: there is absolutely no reason in this day and age to
officially support anything other than IMAP quotas.  (In case anybody
still does need this kind of functionality, it is still available via
the hook driver, which will continue to be maintained).
Unneeded parameter
[mms] Add MongoDB storage driver.
Support mongo driver for Horde_Lock
Abstract out Lock driver test
[mms] Add test factory for MongoDB.
Use new Horde_Test MongoDB factory
Add MongoDB Lock test