Updated git submodules

Project: so master 897bbe5c41436698997743640587cc6287124d0a

Merge "Adding Junit"

Adding Junit

Adding Junit for:
VfRollback.java

Sonar-Link:
https://sonar.onap.org/code?id=org.onap.so%3Aso&selected=org.onap.so.adapters%3Amso-vnf-adapter%3Asrc%2Fmain%2Fjava%2Forg%2Fopenecomp%2Fmso%2Fadapters%2Fvnf%2FVfRollback.java

Change-Id: I3d17c9f745081386be50441f5565518289bcfe36
Issue-ID: SO-473
Signed-off-by: Sumapriya <SS00493505@techmahindra.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index bec3a9d..897bbe5 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit bec3a9d9e071ee9d908e8bf0dcfc7db9b2a75161
+Subproject commit 897bbe5c41436698997743640587cc6287124d0a