[ISPN-4645] Many XSD default values do not match the defaults from the

corresponding configuration builder

https://issues.jboss.org/browse/ISPN-4645

Updated *ConfigurationBuilder and XSD files to have the correct default
values
Modified test case code that verifies the default value for L1
configuration
To clarify a bit, I think we need to change the documentation as well. Something like this:

            <xs:documentation>In ASYNC mode, this attribute can be used to trigger flushing of the queue when it reaches a specific threshold.
            A value of 0 (the default) disables the replication queue.</xs:documentation>