Hotfix bug 1556 - FRM: NPE thrown in notification

* FlowCapableTopologyExpoerter - flow:1 is not exist because it is not created correctly

Change-Id: Ifa5b984329796e5df7aa0f71b1932b73d0ff99a0
Signed-off-by: Vaclav Demcak <vdemcak@cisco.com>
Merge "Hotfix bug 1556 - FRM: NPE thrown in notification"