Previously, only group masters could do this. However, project reporters can
manage project labels, so there doesn't seem to be any need to restrict group
labels further.
Also, save a query or two by getting a single GroupMember object to find out if
the user is a master or not.
Extended ProjectFinder in order to handle the following options:
- current_user - which user use
- project_ids_relation: int[] - project ids to use
- params:
- trending: boolean
- non_public: boolean
- starred: boolean
- sort: string
- visibility_level: int
- tags: string[]
- personal: boolean
- search: string
- non_archived: boolean
GroupProjectsFinder now inherits from ProjectsFinder.
Changed the code in order to use the new available options.
The intention was for this to be used to override group policy in
EE. This led to all sort of strange problems in practice - for
example, https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1025
needed to override `owner` permissions, but `additional_rules!`
passed `master` only. The better solution is to use an EE
module to override the policy. Removing this now defunct method.
