Updated git submodules

Project: msb/apigateway master e23efe553ab495b06937eb29cac43aa833fe15cb

Align architecture release note document sections

Align sections with aggregate architecture and release note sections
Convert release note template to the newer single file form
Add .gitreview file

Change-Id: I9d15de511e5ee85bbcd19dd65d47988ad46aeb35
Issue-ID: DOC-143
Signed-off-by: Rich Bennett <rb2745@att.com>

diff --git a/docs/submodules/msb/apigateway.git b/docs/submodules/msb/apigateway.git
index f44dd44..e23efe5 160000 (submodule)
--- a/docs/submodules/msb/apigateway.git
+++ b/docs/submodules/msb/apigateway.git
@@ -1 +1 @@
-Subproject commit f44dd44bf492f90db2a6802d7e87db5d37e6b632
+Subproject commit e23efe553ab495b06937eb29cac43aa833fe15cb