Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 464775cb4d3e2eb14b25ebba627cae1b81de62ac
  - Improvements in ToscaResourceInstaller

    Improvements in ToscaResourceInstaller according to the Sonar analyses.
    -Removed unnecessary imports.
    -Removed unnecessary exceptions.
    -Improvements for an array size checking.
    -Refactored diamond operators for a simplicity.

    Issue-ID: SO-1984
    Signed-off-by: Robert Bogacki <r.bogacki@samsung.com>
    Change-Id: I498933adadbb2d6f5dc956b0056c728f141e3869

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 203d4b0..464775c 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 203d4b0db84bc0164eab04651de302f2d3868012
+Subproject commit 464775cb4d3e2eb14b25ebba627cae1b81de62ac