Update git submodules

* Update docs/submodules/sdnc/oam.git from branch 'master'
  to 6748f871443426f8ac06a069ac602452b9a837bf
  - Merge "Device input parameter processing failed"
  - Device input parameter processing failed

    Input parameter processing failed, vf-module-topology-operation
    is used instead of vf-module-request-input.

    Change-Id: I578da11c6e0505ee67523504235a64169ccfe605
    Issue-ID: SDNC-653
    Signed-off-by: shashikanth.vh <shashikanth.vh@huawei.com>

diff --git a/docs/submodules/sdnc/oam.git b/docs/submodules/sdnc/oam.git
index ed0e88d..6748f87 160000 (submodule)
--- a/docs/submodules/sdnc/oam.git
+++ b/docs/submodules/sdnc/oam.git
@@ -1 +1 @@
-Subproject commit ed0e88d17989f36501ce0995c336fafcce55e3eb
+Subproject commit 6748f871443426f8ac06a069ac602452b9a837bf