Changes

Use new transaction when processing client notification in a job
If a client notification is processed in a new job, then this job must 
start a new transaction. Sharing of ITransaction between different 
threads must be avoided. In fact the scheduled job may interact with a 
transaction which was already committed.
Change-Id: I9aeea47c83f14b457f9e1f0cf1c3b851844dacb8 Reviewed-on:
https://git.eclipse.org/r/151032 Tested-by: CI Bot Reviewed-by: Ralph
Steiner <rst@bsiag.com>