Missing support for configuration of xa-pool is-same-rm-override

Customers are unable to specify specific datasource configuration parameters.

Here's a specific use case to outline why this is necessary:

• kie-server setup with Oracle for jBPM and EJB timers
• running a process instance with a timer hangs
  until it fails at transaction timeout
• To fix this, the following datasource configuration needs to be applied

            <xa-pool>
                <is-same-rm-override>false</is-same-rm-override>
            </xa-pool>

This is fixed in eap 7.3.3 [1].

Please pick up this version of eap in our rhapm image. 

[1] https://issues.redhat.com/browse/CLOUD-2903