Updated git submodules

Project: usecase-ui master 91c591a198f83eecba7047bc4529d3acd038a932

Merge "Use managed guava version"

Use managed guava version

Use centrally managed guava version specified in
oparent.  Includes upgrade to oparent 1.2.0.

This change was submitted by script and may include
additional whitespace or formatting changes.

Change-Id: I9c9656a07a764ab2e4d3a6c7d5b3be8e322aee5c
Issue-ID: INT-619
Signed-off-by: Gary Wu <gary.i.wu@huawei.com>

diff --git a/docs/submodules/usecase-ui.git b/docs/submodules/usecase-ui.git
index b8e6c5f..91c591a 160000 (submodule)
--- a/docs/submodules/usecase-ui.git
+++ b/docs/submodules/usecase-ui.git
@@ -1 +1 @@
-Subproject commit b8e6c5f79241090311dd785741d4c053c692813a
+Subproject commit 91c591a198f83eecba7047bc4529d3acd038a932