Updated git submodules

Project: sdnc/northbound master cb54816c725dccd5bcaddbe7230d53483d201915

Sonar coverage vnftools - VnfTools

Add junit test cases for VnfTools class
In VnfTools:
  - Fix sonarlint issues (remove un-used private method and etc)
  - Changed tab to 4 spaces as per ONAP Java code style

Issue-Id: SDNC-122
Change-Id: If216f53c8ffa7b646f6ebf18d4b9568cfdf4683b
Signed-off-by: beili.zhou <beili.zhou@amdocs.com>

diff --git a/docs/submodules/sdnc/northbound.git b/docs/submodules/sdnc/northbound.git
index dd3f740..cb54816 160000 (submodule)
--- a/docs/submodules/sdnc/northbound.git
+++ b/docs/submodules/sdnc/northbound.git
@@ -1 +1 @@
-Subproject commit dd3f74074787dfd14e8aec0b48883b780dd8ccba
+Subproject commit cb54816c725dccd5bcaddbe7230d53483d201915