Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Merge "Fix hardcoded domain in wait_for_clf_rules"
  - Fix hardcoded domain in wait_for_clf_rules

    In the CI the availability zones are using a different domain. For
    example instead of "node-1.domain.tld", we have
    "node-1.opnfvericsson.com"

    This patch takes the av zones dynamically from nova hypervisor-list.

    Change-Id: Ifa26dbbb6b8d415ee30bb1216fc1150f65096a16
    Signed-off-by: George Paraskevopoulos <geopar@intracom-telecom.com>

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
index e61239d..f3f681a 160000 (submodule)
--- a/docs/submodules/sfc
+++ b/docs/submodules/sfc
@@ -1 +1 @@
-Subproject commit e61239dbb4f96bb4b798cd3c6e6d6c953d4fcee4
+Subproject commit f3f681af057352f26c7447009b0a9cdc144fac5c