Added the Optimization Framework OSDF doc folder

Issue-ID: OPTFRA-65
Change-Id: Ie71fc7a72996bff6312630281a50778fa3da418b
Signed-off-by: Sastry Isukapalli <sastry@research.att.com>
diff --git a/docs/release/repolist.rst b/docs/release/repolist.rst
index af52d0c..b7c31b1 100644
--- a/docs/release/repolist.rst
+++ b/docs/release/repolist.rst
@@ -68,3 +68,4 @@
    VNF Software Development Kit <../submodules/vnfsdk/model.git/docs/index>
    vvp/documentation <../submodules/vvp/documentation.git/docs/index>
    aai/event-client <../submodules/aai/event-client.git/docs/index>
+   optf/osdf <../submodules/optf/osdf.git/docs/index>