Make test_jenkins_artifacts more forgiving
Make test_jenkins_artifacts more forgiving

On some systems, 127.0.0.1 reverse-resolves to an actual hostname, and
not to 'localhost'. Hence, match the output by the IP address instead.

jduan/jenkinsapi,imsardine/jenkinsapi,JohnLZeller/jenkinsapi,imsardine/jenkinsapi,imsardine/jenkinsapi,jduan/jenkinsapi,mistermocha/jenkinsapi,zaro0508/jenkinsapi,mistermocha/jenkinsapi,JohnLZeller/jenkinsapi,JohnLZeller/jenkinsapi,mistermocha/jenkinsapi,zaro0508/jenkinsapi,salimfadhley/jenkinsapi,domenkozar/jenkinsapi,aerickson/jenkinsapi,aerickson/jenkinsapi,domenkozar/jenkinsapi,salimfadhley/jenkinsapi,zaro0508/jenkinsapi