Update git submodules

* Update docs/submodules/msb/discovery.git from branch 'master'
  to a38445e24d1d508b0c1e039147eee48b06d88d37
  - Migrate msb-discovery docs

    Merging this will create
    https://onap-msb-discovery.readthedocs.io
    This build will run in parallel
    to the current docs generation method
    until we are ready to cut over.

    Issue-ID: CIMAN-364
    Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
    Change-Id: Ie84637587b9a1b41fa63e15df633b79ae0f47a0b

diff --git a/docs/submodules/msb/discovery.git b/docs/submodules/msb/discovery.git
index 4809cc1..a38445e 160000 (submodule)
--- a/docs/submodules/msb/discovery.git
+++ b/docs/submodules/msb/discovery.git
@@ -1 +1 @@
-Subproject commit 4809cc1162e266a220e1b125309a3166e1d9cceb
+Subproject commit a38445e24d1d508b0c1e039147eee48b06d88d37