[VOL-3001] Separating flows, groups and meters from LogicalDevice.
- This is to improve the performance of flow addition to system.
- This patch does not include separation of the flows from Device. It will be implemented in another patch.
- Flows, groups and meters are kept in store by their unique ids per logical device, and cached into a map with these unique ids per logical device again.
  Accessing to this store and map is synchronized by a RWLock.
  Also a lock is kept in memory per flow, meter and group to synchronize the modifications (add/modify/delete requests) per flow/meter/group.
Change-Id: Ic0135faef0bbd1664693375fa6527e0242919e6d
diff --git a/go.sum b/go.sum
index 9c59be9..d66b654 100644
--- a/go.sum
+++ b/go.sum
@@ -196,8 +196,8 @@
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-github.com/opencord/voltha-lib-go/v3 v3.1.9/go.mod h1:26TG6ABl+ppP754YWhhgao9wKNL3SuUf/KztQcJFqrQ=
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