Update git submodules

* Update docs/submodules/opera from branch 'stable/danube'
  - Updated Ellis configuration

    1. Fix the Ellis port inaccessible issue
    2. Force to pull the latest juju server code

    Change-Id: I8b36271e37e19d3ebab03a9808f11d210f975d59
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit 654e20848b723541c17d56cf16518db87e14f7ae)

  - fix pyyaml bug

    package_prepare should run before generate_conf to
    ensure pyyaml is installed. otherwise generate_conf
    will fail when pyyaml is not installed before.

    Change-Id: I181225637969f3602ce34984e4710a2610e8cd18
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit a6346420a0e0d2f4564d8ecc030146cae098a7f4)

  - Merge "Add delay when upload csar package fail" into stable/danube
  - Opera Docs

    version: firt draft

    Change-Id: Id0ba01cd205229f0a11ce0d9a921f5fce84dd221
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit f8eb16e4a3c38d4899234c95356c88f9c80789da)

  - Add delay when upload csar package fail

    There is occasional failure when upload csar package.
    Add 10 second 10 retries to workaroud this problem.

    Change-Id: I0d081699d744bc2a3f93d23fa5afea48f426beff
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit f809fd6d07d3447af62297377f963e1c6e4556e3)

  - add get_vnfm_ip

    add function get_vnfm_ip to get juju client vm ip

    Change-Id: Ib78d81ab2bb54ecc197581913c5127235bc563da
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit 4867ce93ff214e5bcb1b3b178173080a17bfc5dd)

  - fix csar bug

    csar vars not generate when vnf_type is None.
    modify process_conf to fix this bug

    Change-Id: I9967acc9d7c1cea9012f8feb5b8f0141f1c6d3b8
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit f1ef7f43d12751b10314a7e07c3e3ae815057a39)

  - Add upload packages retry

    1. retry 5 times if csar package uploads fail
    2. clearwater service name varies over the time
    3. use the word vnf instead of app

    Change-Id: Id85c7f467cbefbc46fd1f1daf6202d89ef3ac898
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit 8a07bcd6b75f62c7c79504f8a3c020a2d635156e)

  - independent network for opera

    1. launch open-o dockers directly on jump host instead of a vm
    2. launch only one juju vm has both client and metadata function
    3. add clearwater csar packages into opera repo
    4. automatically deploy clearwater when key application in
       conf/application.yml has value clearwater
    5. support keystone v3

    Change-Id: Ic59f66d2cededf661aa7f6de2a40836ea40d8887
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    (cherry picked from commit cd0feb45a414980fdd7249c9cc4fc28a1213c769)

diff --git a/docs/submodules/opera b/docs/submodules/opera
index 4867ce9..a10160e 160000 (submodule)
--- a/docs/submodules/opera
+++ b/docs/submodules/opera
@@ -1 +1 @@
-Subproject commit 4867ce93ff214e5bcb1b3b178173080a17bfc5dd
+Subproject commit a10160eb86f804a9daafdf156812c6b90f1b01a3