wording (fixes bnc#897528)
raise error in case zypper tries to go interactive
Merge pull request #176 from SUSE/review_140922_raise_error_in_case_zypper_tries_to_go_interactive

[Review] Request from 'digitaltom' @ 'SUSE/connect/review_140922_raise_error_in_case_zypper_tries_to_go_interactive'