Update git submodules

* Update docs/submodules/dcaegen2.git from branch 'master'
  to 6613b25c7de599d047189c27b930b873749878f2
  - Merge "commit message for doc"
  - commit message for doc
    
    commit message for documentation for bp gen tool, got rid of readme
    
    Change-Id: I816a9742023be95de3078321059335fb24a74721
    Issue-ID: DCAEGEN2-1125
    Signed-off-by: ms236b <ms236b@att.com>
    
diff --git a/docs/submodules/dcaegen2.git b/docs/submodules/dcaegen2.git
index 649297a..6613b25 160000
--- a/docs/submodules/dcaegen2.git
+++ b/docs/submodules/dcaegen2.git
@@ -1 +1 @@
-Subproject commit 649297ad90471f8e51dab1248e157568faa9ab71
+Subproject commit 6613b25c7de599d047189c27b930b873749878f2