Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 50cbf91801eed6445d10da5ede3d6177365752b1
  - Add logic to delete resource also from AAI
    
    Delete resources (AccessConnectivity, InternetProfile) from AAI in delete operation
    
    Issue-ID: SDNC-791
    
    Signed-off-by: Pérez Caparrós David <David.PerezCaparros@swisscom.com>
    Change-Id: I4a3eb7880e3736656acf30342ac98aa84cd62afb
    
diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index 8e06b22..50cbf91 160000
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit 8e06b22a975e1783b6d9a89ed6f9accc226bc676
+Subproject commit 50cbf91801eed6445d10da5ede3d6177365752b1