Update git submodules

* Update docs/submodules/usecase-ui.git from branch 'master'
  to c46bae2a8435ae6e27e242c0a158f4c99214461f
  - fix: fix bugs of adding customers
    
    Change-Id: I177fc3a15aa49beefc3ea5c372a2e60dc594c90d
    Issue-ID: USECASEUI-306
    Signed-off-by: cyuamber <xuranyjy@chinamobile.com>
    
diff --git a/docs/submodules/usecase-ui.git b/docs/submodules/usecase-ui.git
index 5da7091..c46bae2 160000
--- a/docs/submodules/usecase-ui.git
+++ b/docs/submodules/usecase-ui.git
@@ -1 +1 @@
-Subproject commit 5da70916a3eb0295daf5e715b3ee69aa082e41ad
+Subproject commit c46bae2a8435ae6e27e242c0a158f4c99214461f