metrics: Fix FIO test to remove the volume created
metrics: Fix FIO test to remove the volume created

Currently while running the Fio test creates a volume in the host,
however, the script should remove the volume at the end of the test.

Fixes #930

Signed-off-by: Gabriela Cervantes <7478955d4356a4dc893d64d1345a99c9f58c91ab@intel.com>

devimc/tests,devimc/tests,clearcontainers/tests,clearcontainers/tests,chavafg/tests,chavafg/tests