Update git submodules

* Update docs/submodules/opera from branch 'stable/danube'
  - run without sudo

    Jenkins can't remove some dir generate by sudo
    and leads to CI error for following tasks.

    Change codes to run ./opera_launch.sh without
    sudo

    Change-Id: Iaebd7e1fbdf413a91cc55c77e1b5c6915cfc86d6
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit 7ee5c95db62d13d860d51974aa9c0a14404cee56)

diff --git a/docs/submodules/opera b/docs/submodules/opera
index a10160e..5a9cd98 160000 (submodule)
--- a/docs/submodules/opera
+++ b/docs/submodules/opera
@@ -1 +1 @@
-Subproject commit a10160eb86f804a9daafdf156812c6b90f1b01a3
+Subproject commit 5a9cd98783bf7547cb56b3da84521315d3354f21