fix(deprecation): update to new method (#214)

Signed-off-by: Felipe Zipitria <fzipitria@perceptyx.com>

_modules/ovs_config.py

 from __future__ import absolute_import
 
 import logging
-import salt.utils
+import salt.utils.path
 
 log = logging.getLogger(__name__)
 
     '''
     Only load the module if Open vSwitch is installed
     '''
-    if salt.utils.which('ovs-vsctl'):
+    if salt.utils.path.which('ovs-vsctl'):
         return 'ovs_config'
     return False