Update git submodules

* Update docs/submodules/vnfrqts/usecases.git from branch 'master'
  to af8806162a4bf77f92c90e71fa39dee724ab3a65
  - VNFRQTS - Use case links fix
    
    Issue-ID: VNFRQTS-552
    
    Change-Id: Ibaf903eaf8ba520749f39dd21c7a97215fcfce23
    Signed-off-by: Hagop Bozawglanian <hagop.bozawglanian@att.com>
    
diff --git a/docs/submodules/vnfrqts/usecases.git b/docs/submodules/vnfrqts/usecases.git
index 8a9a246..af88061 160000
--- a/docs/submodules/vnfrqts/usecases.git
+++ b/docs/submodules/vnfrqts/usecases.git
@@ -1 +1 @@
-Subproject commit 8a9a246a185ab7610229ccdd2cbbad28ecb64d63
+Subproject commit af8806162a4bf77f92c90e71fa39dee724ab3a65