Update git submodules

* Update docs/submodules/vswitchperf from branch 'master'
  - Merge "openSUSE support"
  - openSUSE support

    Modified support for Leap 42.2 so not to be prompted for y/n on update
    and installation of required packages.
    Added Leap 42.3 as supported OS.
    Upgraded documentation accordingly.

    Change-Id: I33f3046a5b33bc842534a16911423a2febaa9417
    Signed-off-by: Marco Varlese <marco.varlese@suse.com>

diff --git a/docs/submodules/vswitchperf b/docs/submodules/vswitchperf
index bc150cc..af7a007 160000 (submodule)
--- a/docs/submodules/vswitchperf
+++ b/docs/submodules/vswitchperf
@@ -1 +1 @@
-Subproject commit bc150cc8b5a06a79b5c2308407718b2ba9a04a2b
+Subproject commit af7a007b92dd344cede2071ae77a621f9cc15c22