* Update docs/submodules/storperf from branch 'master'
- Merge "Prevent user from starting a second job while one is already running."
- Prevent user from starting a second job while one is already running.
JIRA: STORPERF-214
Change-Id: I1fe7c0bc61dfa7899d39cee1d13f99b2435115cd Signed-off-by: Taseer Ahmed <taseer94@gmail.com>