Update git submodules

* Update docs/submodules/opera from branch 'master'
  - Adjust casr upload

    Try to fix csar upload 500 error

    Change-Id: Ifffc6dacb4adf215076f7374551972af692e2f5d
    Signed-off-by: huangxiangyu <huangxiangyu5@huawei.com>

diff --git a/docs/submodules/opera b/docs/submodules/opera
index 5578c5f..a21e24c 160000 (submodule)
--- a/docs/submodules/opera
+++ b/docs/submodules/opera
@@ -1 +1 @@
-Subproject commit 5578c5fe6f96220e5f38b0f285d6dbbe61b525f3
+Subproject commit a21e24c979c121d01a73f0f78161549dd62e4ba2