change format of zypper product identifier to <internal name>/<version>/<architecture>
refactor integration steps
add integration tests for language and extension activation
fix rubocop warnings
mute rubocop
Merge pull request #96 from SUSE/review_140602_suseconnect_command_line_client_integration_tests

[Review] Request from 'vlewin' @ 'SUSE/connect/review_140602_suseconnect_command_line_client_integration_tests'