Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to ac1a59fc6731c6261712eac5bec76816b11d1096
  - Merge "Added Basic Authorization in sending Subscription to VNFM"
  - Added Basic Authorization in sending Subscription to VNFM

    Ve-Vnfm (SOL002) Adapter project

    Issue-ID: SO-2574
    Signed-off-by: Piotr Borelowski <p.borelowski@partner.samsung.com>
    Change-Id: I819e95c4e212695bc38ab5b7d221be712f87320e

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 93c822c..ac1a59f 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 93c822c255db9b1f8ee9f68e6677417e38919abe
+Subproject commit ac1a59fc6731c6261712eac5bec76816b11d1096