Introduce flags for different role types

[mhinkie]

Is your feature request related to a problem? Please describe.
Currently resource specific roles (e.g. ISSUE_DELETE), also referred to as author roles, are not seperated in any way from platform wide roles (e.g. ISSUE_DELETE_ALL or ISSUE_CREATE). The distinction is only made in the API by examining the actual name of the role.
Example how this distinction is made

Describe the solution you'd like

• Introduce a flag in the privilege table, that indicates if this privileges is resource specific.
• Query this flag in the API should this distinction be necessary (as for example it is in PrivilegeRepository)
  • Queries using "like '%ALL' OR p.name like '%CREATE''" should then not be necessary anymore
• Extend Privilege class as well as impacted services in the API to reflect this change
• Examine usages of the Privilege class to find out if more adjustments need to be made