Added interface PrevaylerServiceConnection to replace/fusion:

The execute method in PrevaylerService

The beginTransaction, commitTransaction, and rollbackTransaction.

Possibly, PropogationContext will be fusion with interface also in the
future.

PrevaylerServiceConnection is now used in bind tool.

Signed-off-by: Jakob Brandsborg Ehmsen <jakobehmsen.github@gmail.com>