qa/workunits/hadoop/wordcount: remove bogus rm -r

Signed-off-by: Sage Weil <sage@redhat.com>
qa: fix+cleanup hadoop wordcount test

The glob for the examples jar was wrong.

Fixes: #9260

Signed-off-by: John Spray <john.spray@redhat.com>
Merge pull request #2355 from ceph/wip-hadoop

Wip hadoop

Reviewed-by: Sage Weil <sage@redhat.com>