set permission for config file
set permission for config file

Signed-off-by: tamil <9e0c939d8bdea528e60fdb7c5b28595eb7c90423@inktank.com>

yghannam/teuthology,zhouyuan/teuthology,t-miyamae/teuthology,ceph/teuthology,zhouyuan/teuthology,ivotron/teuthology,ceph/teuthology,dmick/teuthology,robbat2/teuthology,yghannam/teuthology,ktdreyer/teuthology,SUSE/teuthology,SUSE/teuthology,dmick/teuthology,t-miyamae/teuthology,michaelsevilla/teuthology,dreamhost/teuthology,ivotron/teuthology,michaelsevilla/teuthology,ktdreyer/teuthology,dreamhost/teuthology,tchaikov/teuthology,dmick/teuthology,caibo2014/teuthology,robbat2/teuthology,SUSE/teuthology,tchaikov/teuthology,caibo2014/teuthology