Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 78071bdcd6307acced45ca490d33897347338b99
  - Merge changes I910db5fe,I269f4e20,I2ad55d49,I1cb6eee0,Ifa375512, ...

    * changes:
      add vid based apis details
      add uui based apis details
      add vid based instantiation flows
      add e2e flow details
      add pnf instantiate flows
      add the NBI section to the instantiate flows

  - add vid based apis details

    Issue-ID: SO-608

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I910db5fe7e2006ec3808ce738fd11fb9b061e47a

  - add uui based apis details

    Issue-ID: SO-608

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I269f4e20e0c30168a97ef3db056a69fefd564eac

  - add vid based instantiation flows

    Issue-ID: SO-608

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I2ad55d49bd1be2a684354f958dcbe93cf0dbaf17

  - add e2e flow details

    Issue-ID: SO-608

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I1cb6eee09292ed206a4315e1e9245d35256fd357

  - add pnf instantiate flows

    Issue-ID: SO-608

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: Ifa375512d97aa5f9c56156a20eae5e220ef0039c

  - add the NBI section to the instantiate flows

    Issue-ID: SO-608

    Signed-off-by: seshukm <seshu.kumar.m@huawei.com>
    Change-Id: I5567a89fa36aa85397a3472147e7848f44561a48

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index a1f955a..78071bd 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit a1f955a0b3c9e406786ba429ee08a22c95a9b793
+Subproject commit 78071bdcd6307acced45ca490d33897347338b99