[FAB-14010] Integration test- remove OSN from cluster
[FAB-14010] Integration test- remove OSN from cluster

This change set adds an integration test that removes an OSN
from an application channel and system channel and ensures
that the OSN gracefully shuts down for these channels.

Change-Id: Idcdad8083f5881c6194185ad5f623c9c64323a02
Signed-off-by: yacovm <632344b5da9bd743456189af4db4b56472defb8c@il.ibm.com>

xixuejia/fabric,xixuejia/fabric,xixuejia/fabric