Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 662f2cdcb69c7ec2264493a8c329f946001c1020
  - Add controller for OrchestrationTask
    
    Issue-ID: SO-2368
    
    Add custom controller for OrchestrationTask
    in requestDB adapter
    
    Change-Id: I88ee0f7ee06131400d12b2f085853823af1a035c
    Signed-off-by: Harry Huang <huangxiangyu5@huawei.com>
    
diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 3c83d49..662f2cd 160000
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 3c83d49d9b70d8dd371ad5bf4dfc22a070344102
+Subproject commit 662f2cdcb69c7ec2264493a8c329f946001c1020