hadoop: remove parallel from import; fixes linter warning
hadoop: remove parallel from import; fixes linter warning

Signed-off-by: Greg Farnum <ddf08f52dfbf554083d43d4688a3a05bda539ab6@redhat.com>

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