Redirect stderr during cleanup
Redirect stderr during cleanup

StdErr can be safely ignored since it
implies environment is already clean.
The rm cmds are intended to ensure that we do not do
comparisions with old stats.

Change-Id: If359bfe2fd4e148675f608d1073412439aa233fa

hisundar/forestdb,couchbase/forestdb,wurikiji/forestdb,couchbase/forestdb,hisundar/forestdb,wurikiji/forestdb