Added unittest2 so travis can run tests with recent Python
Added unittest2 so travis can run tests with recent Python

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