Update git submodules

* Update docs/submodules/storperf from branch 'master'
  - Merge "Add metadata url to reporting docs"
  - Add metadata url to reporting docs

    Missing URL created confusion as to which url is to be entered
    in reporting module.

    Change-Id: I0d2db471a8335c8ea8e4f434da4223ec5a0e8741
    JIRA: STORPERF-230
    Signed-off-by: Shrenik <shrenik.jain@research.iiit.ac.in>

diff --git a/docs/submodules/storperf b/docs/submodules/storperf
index 9100f1a..b697f58 160000 (submodule)
--- a/docs/submodules/storperf
+++ b/docs/submodules/storperf
@@ -1 +1 @@
-Subproject commit 9100f1afcc426b387dee3673151786680bfe0718
+Subproject commit b697f58b66c8ae425a6cccd22ba5740d9168f5ce