Update git submodules

* Update docs/submodules/modeling/modelspec.git from branch 'master'
  to 64a42e8266437be21281f5aa08a1592f7667b5fd
  - Merge "Updates to Vnf"
  - Updates to Vnf

    Fixed allotted resource diagram, which had a number of broken classes
    and associations.   Also started draft work on configuration concept.

    Issue-ID: MODELING-104

    Change-Id: Ia3cda6e19fdb5e2ae4fced3c36875dc2f3534f80
    Signed-off-by: Kevin Scaggs <ks0567@att.com>

diff --git a/docs/submodules/modeling/modelspec.git b/docs/submodules/modeling/modelspec.git
index 9f6dd05..64a42e8 160000 (submodule)
--- a/docs/submodules/modeling/modelspec.git
+++ b/docs/submodules/modeling/modelspec.git
@@ -1 +1 @@
-Subproject commit 9f6dd053d72c04fffe46f1243b1280732dc4ec4f
+Subproject commit 64a42e8266437be21281f5aa08a1592f7667b5fd