Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 862c7e03f4330d9ae8f9e73c912e74064294f9ce
  - Merge "Removed redundant null checks (at these points vnfCustom can be empty, but not null)"
  - Removed redundant null checks (at these points
    vnfCustom can be empty, but not null)

    Issue-ID: SO-1841
    Signed-off-by: Oleksandr Moliavko <o.moliavko@samsung.com>
    Change-Id: I174635fd0df71811c05ea3ad52f8ec5e5b56c58c

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 6a6ac75..862c7e0 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 6a6ac7539aeeb83bab6d87798f1ef1a0ba98597f
+Subproject commit 862c7e03f4330d9ae8f9e73c912e74064294f9ce