qa/suites/nvmeof/thrash: Run fio for 20mins

Instead of 30mins.

Signed-off-by: Vallari Agrawal <[email protected]>

Author: VallariAg

qa/suites/nvmeof/thrash/workloads/fio.yaml

@@ -9,4 +9,4 @@ tasks:
       RBD_POOL: mypool
       NVMEOF_GROUP: mygroup0
       IOSTAT_INTERVAL: '10'
-      RUNTIME: '1800'
+      RUNTIME: '1200'