Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to abf26b852c2d68f5677ab1d9ac703a62429250d8
  - Merge "Update Docker dependence of sdnc-ansible-server"
  - Update Docker dependence of sdnc-ansible-server

    Revert to onap/ccsdk-ansible-server-image:${ccsdk.docker.version}

    Change-Id: I862d9fc37035ff0eff832141f6e699e2d8900315
    Issue-ID: SDNC-1113
    Signed-off-by: Enbo Wang <wangenbo@huawei.com>

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index c1ca7a3..abf26b8 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit c1ca7a330e779065f34285782c79748be43bd340
+Subproject commit abf26b852c2d68f5677ab1d9ac703a62429250d8