radosgw-admin: fix errors found by pyflakes
radosgw-admin: fix errors found by pyflakes

Using the wrong variable, and true/false are capitalized in python.

Signed-off-by: Josh Durgin <51652c783f70f5b272ebd02f1fd20d3af7a2449f@inktank.com>

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