Fix backport bug -> Rename json to simplejson

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Fix undefined variable bug introduced in 10c60b61

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
Merge pull request #1267 from autotest/fix-backport-bug

Fix backport bug