Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Get hardware info of SUT

    Hardware info:
    Use ansible to get all hardware info from all nodes.

    JIRA: DOVETAIL-540

    Change-Id: I6a2dde1b2ebae2af8f702008c23110ebe63cc06f
    Signed-off-by: xudan <xudan16@huawei.com>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index c70193d..c73df2b 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit c70193d65811a8a2a3b50fdad5463bca3643e219
+Subproject commit c73df2bb04147df075199abc79bc69a2c7a1cc22