Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7e48647993fa648ba34716f1f481bfd139b94943
  - Merge "Remove unused variables from class file. Remove unused local variables from class files. Issue-ID: SO-1490"
  - Remove unused variables from class file.
    Remove unused local variables from class files.
    Issue-ID: SO-1490

    Change-Id: I8d0a39183883d97ab54ea04ce62f520247958a48
    Signed-off-by: h00397475 <hena.choudhury@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 9893272..7e48647 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 98932725f019a391410c51bf7bf65b4a32c2d4fe
+Subproject commit 7e48647993fa648ba34716f1f481bfd139b94943