Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 89973876dbbf8ad910420d60f8dcbb0c89bf6c62
  - Merge "add junit coverage for SvnfmService"
  - add junit coverage for SvnfmService
    
    Change-Id: I18f0f226c8805ed8755cd11edefcabfd8a7897a4
    Issue-ID: SO-1576
    Signed-off-by: Lukasz Muszkieta <lukasz.muszkieta@nokia.com>
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index c6a693a..8997387 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit c6a693aadd4f6d10ab1e2b0313ae4d3511bd136b
+Subproject commit 89973876dbbf8ad910420d60f8dcbb0c89bf6c62