Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Use PDF(POD descriptor file) and correct the mapping of nodes and roles"
  - Use PDF(POD descriptor file) and correct the mapping of nodes and roles

    JIRA: DAISY-42
    JIRA: DAISY-56

    In bare metal deployment, we can use PDF to get MAC addresses of nodes
    https://gerrit.opnfv.org/gerrit/#/c/38387/.
    Then we can use the MACs to help to distinguish the discovered nodes
    and assign roles to them, like virtual deployment in the link
    https://gerrit.opnfv.org/gerrit/#/c/38381/.

    Change-Id: Ib0f1a60b8935f528a828f716ccc916b767cfa6f9
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 257e378..62db626 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 257e378a4efcc23d9d24ade17ec098c8de53e6de
+Subproject commit 62db6264951f84811b5fb29361078f7d4a1ce493