Define credentials for JIRA integration on a system level
Reading gitlab-ce#25541 and thinking about empowering devs our workflows would become a lot easier if credentials for the JIRA integration could be defined on a system and/or group level.
Scenario: When ever devs start a new project they would know the proper project key and could configure the integration accordingly. Credentials on the other hand
- would probably never change,
- be the same for all projects,
- would not be known to devs and
- require unnecessary round-trips to ops.