Ensure there is expression testing, basic transformation testing and reject-expression transformation testing for all subsystems

Task to track the work we've all been doing on expressions/transformers.

See JaxrSubsystemTestCase for an example of what I'd like to see for each subsystem:

1) The standard subsystem test applied to a config that covers the full xsd with expressions added to each relevant attribute.

2) Basic transformation testing against 7.1.2 and 7.1.3

3) Reject-expression testing against 7.1.2 and 7.1.3

Assigned to me but this is really a team effort, with a big chunk already done. Please use comments on this JIRA to indicate if you're looking at something.

Please edit this description and put an OK after the subsystem name to indicate it's good to go.

clustering/jgroups [OK]
clustering/infinispan - [OK]
cmp [OK]
configadmin [OK]
connector/datasource [OK] following https://github.com/jbossas/jboss-as/pull/4060
connector/jca [OK]
connector/resource-adapter [OK]
deployment-scanner - [OK]
ee - [OK]
ejb3 [OK]
jacorb - [OK]
jaxr [OK]
jaxrs [OK] empty subsystem
jdr - [OK] empty subsystem
jmx [OK]
jpa [OK]
jsf [OK]
jsr77 [OK] empty subsystem
logging [OK]
mail [OK]
messaging [OK]
modcluster [OK]
naming [OK]
osgi [OK]
pojo [OK] empty subsystem
remoting - [OK]
sar [OK] empty subsystem
security [OK]
threads [OK]
transactions [OK]
web [OK]
webservices - [OK]
weld [OK] empty subsystem
xts - [OK]