Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7815bcec2a85b023f3004e698712cea7fed2f94e
  - Merge "Fix a NullPointerException on getting no data from"
  - Fix a NullPointerException on getting no data from

    Fix a NullPointerException on getting no data from the Catalog DB.

    Change-Id: Ibeb7206f2427104623943f964afff377ca666d28
    Issue-ID: SO-1695
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@us.att.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 76219c9..7815bce 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 76219c97a86150dbe2d9c5dd439e0faa1637e8b1
+Subproject commit 7815bcec2a85b023f3004e698712cea7fed2f94e