Update git submodules

* Update docs/submodules/storperf from branch 'master'
  - Re-instating docker build verify

    Change-Id: I720ba0c8e413d5c61e8d6f9a13eae0441df53ccb
    Signed-off-by: mbeierl <mark.beierl@dell.com>

diff --git a/docs/submodules/storperf b/docs/submodules/storperf
index 21644ee..7ef0242 160000 (submodule)
--- a/docs/submodules/storperf
+++ b/docs/submodules/storperf
@@ -1 +1 @@
-Subproject commit 21644ee3689be254791809c791a18fcce7495aa1
+Subproject commit 7ef0242a48088ba9038873f8d92992957d1b2b77