Update git submodules

* Update extensions/Renameuser from branch 'REL1_31'
  to 21f254948a422f367b397cc842dce85f521f83ff
  - Fix incorrect usage in RenameUserJob

    Too many rewrites of that code while I was writing it.

    Also, no idea why that was passing false to in_array()'s $strict
    parameter.

    Bug: T198285
    Change-Id: Ib4ab555f53f5ffa95ef7c974c3a53f33a34d2ad5
    (cherry picked from commit 130b99c4613058dfda0a9532c9794f516933b8b6)

diff --git a/extensions/Renameuser b/extensions/Renameuser
index f8e5157..21f2549 160000 (submodule)
--- a/extensions/Renameuser
+++ b/extensions/Renameuser
@@ -1 +1 @@
-Subproject commit f8e515711db88fdd2aae02b760d2e11df3d70489
+Subproject commit 21f254948a422f367b397cc842dce85f521f83ff