Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 2fa42bd9e13394f0acd665c54d2bd8b2ec7a8265
  - Merge "Removed MsoLogger from 'mso-vfc-adapter'"
  - Removed MsoLogger from 'mso-vfc-adapter'

    Removed MsoLogger from adapters ('mso-vfc-adapter')
    Replaced MsoLogger with plain slf4j.
    Refactored login output.
    Fixed imports.

    Change-Id: Ib7561440520bdd9e1f0257639ab52f32f9bdb98e
    Issue-ID: LOG-631
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 4864623..2fa42bd 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 48646235563469235f65dd18d75ea8129587895f
+Subproject commit 2fa42bd9e13394f0acd665c54d2bd8b2ec7a8265