fix small bugs
diff --git a/rally_runner.py b/rally_runner.py
index 093ae12..90051fb 100644
--- a/rally_runner.py
+++ b/rally_runner.py
@@ -2,6 +2,7 @@
import json
import time
import yaml
+import logging
import warnings
import functools
import contextlib
@@ -14,10 +15,12 @@
from rally.benchmark.scenarios.vm.vmtasks import VMTasks
import itest
-from log import log
from utils import get_barrier, wait_on_barrier
+log = logging.getLogger("io-perf-tool").debug
+
+
@contextlib.contextmanager
def patch_VMTasks_boot_runcommand_delete():