testsuite: encourage users to create a case in RHTS

Related to rhbz#1055565

Signed-off-by: Jakub Filak <jfilak@redhat.com>
cli list: show a hint about creating a case in RHTS

Resolves rhbz#1055565

Signed-off-by: Jakub Filak <jfilak@redhat.com>
Merge pull request #795 from abrt/rhbz1055565_cli_list_hint

RHEL7: how to create a case in Red Hat Customer Portal in 'abrt-cli list' output