#414 OR grouping JAAS login module

[Sebastian Hauer]

This module will allow to group a bunch of login
modules under one flag. If one of these specified sub
login modules succeeds this login module will succeed.
If all sub login modules fail this login module will fail.

One example where something like this might be useful
is if you have a bunch of login modules you might want
to use for authentication. Yet possibly only one of
these login module will succeed.
Once one of these login modules is successful you will
need to run an "Optional" or "Required" flagged login
module, e.g. a role login module.

[Sebastian Hauer]

OR grouping login module