Changes to default configurations for 4.2/5.0

[adrian.brock]

For 4.2 and 5.0 we should change the default JCA configurations
to take advantage of all the features associated with the relevant backend.

The main change should be to enable

<set-tx-query-timeout/>

for all databases.

Other changes should include enable to valid connection checkers
e.g. the Oracle one in oracle-ds.xml

[weston.price]

Come again? I am not sure what you are referrring to.

[weston.price]

Sorry I missed your referring discussion. Got it now.