nuke.py: Fix some spelling/capitalization errors.
nuke.py: Fix some spelling/capitalization errors.

Signed-off-by: Dan Mick <b07550071eaa6a9296289c43bbd6c90559196431@redhat.com>

SUSE/teuthology,dmick/teuthology,dmick/teuthology,ktdreyer/teuthology,ceph/teuthology,ceph/teuthology,dmick/teuthology,SUSE/teuthology,ktdreyer/teuthology,SUSE/teuthology