Topology Manager is GA now

Author: SergeyKanzhelev

keps/sig-node/693-topology-manager/kep.yaml

@@ -8,7 +8,7 @@ authors:
 owning-sig: sig-node
 participating-sigs:
   - sig-node
-status: implementable
+status: implemented
 creation-date: 2019-01-30
 reviewers:
   - "@vikasc"