Added optf/has to doc index

Optf project owners wanted to start first with
this one repo. Will add others as they come
online or become relevant.

Change-Id: Iea2e112473214f1c91a76a7fb63503a6889efa1e
Issue-Id: DOC-47
Signed-off-by: Spencer Seidel <jsseidel@fastmail.com>
diff --git a/.gitmodules b/.gitmodules
index 8b64147..6962e28 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -33,3 +33,8 @@
 	url = ../aai/search-data-service
         branch = .
         ignore = dirty
+[submodule "docs/submodules/optf/has.git"]
+	path = docs/submodules/optf/has.git
+	url = ../optf/has
+        branch = .
+        ignore = dirty