Update git submodules

* Update docs/submodules/modeling/modelspec.git from branch 'master'
  to f7226ae9143696a7959fcc02b5b1b36db38f3c13
  - Updates to Vnf Stereotypes

    Updated stereotypes that were part of accepted ETSI 2.5.1 from
    Experimental to Preliminary

    Issue-ID: MODELING-104

    Change-Id: I2b03a5918619f8344aa7bf7dd0ba1bfadd55b338

    Change-Id: I2b03a5918619f8344aa7bf7dd0ba1bfadd55b338
    Signed-off-by: Kevin Scaggs <ks0567@att.com>

diff --git a/docs/submodules/modeling/modelspec.git b/docs/submodules/modeling/modelspec.git
index d614662..f7226ae 160000 (submodule)
--- a/docs/submodules/modeling/modelspec.git
+++ b/docs/submodules/modeling/modelspec.git
@@ -1 +1 @@
-Subproject commit d61466290d03e8a28035c5dc19361d6f2376af99
+Subproject commit f7226ae9143696a7959fcc02b5b1b36db38f3c13