Remove wildcard from transaction properties on txProxyTemplate

We need to remove the following
<prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
from txProxyTemplate as this means that all methods on bean are transactional.

wild card should be
<prop key="*">PROPAGATION_NOT_SUPPORTED</prop>
This will prevent all undeclared method signatures from being transactional.

Benefits are:
1. Better control over transactions
2. Better performance since some method will not create transactions

This is a small change but will require a lot of testing and review. Potentially we will need to add more signatures to txProxyTemplate.