Configuration overrides for boolean types getting mixed up

Configuration override application is not working properly for boolean types.

It seems like that if you enable lazy deserialization for example, jmx statistics are enabled as well!

This is causing most of Infinispan 2nd level cache provider tests to fail since they rely on overrides.

Vladimir, this looks to be related to the new configuration overriding code you wrote a few weeks back. Could you please have a look to it?