Migrate from JUnit 4 to JUnit 5

Adding getContributors sort by asc / desc support

Fix #810 : Change all model Ids to Long

Update Deployment API 

Implement keys api

Actually fetch all the memberships with UserAPI.getMemberships() and …

Fixed de-serialization of MembershipSourceType by letting the Jackson…

Fixed de-serialization of MembershipSourceType by letting the JacksonJsonEnumHelper know that the first letter should be capitalized

Actually fetch all the memberships with UserAPI.getMemberships() and also provide a pager based method for lazy fetching

Fix #767 : Adding merge request note award functions and renaming issue functions

configure jersey to use jackson over json binding

Create new projects from project template.

Include Pipeline data in Merge Request model

Added support for scope attribute to EventsApi

Upload: accept an InputStream besides a File

Feature: Replace auth token with supplier

Add top_level_only parameter to GroupFilter

Fix #800 Increase max Artifact size from Integer to Long

Fix gitlab4j#805 Increase CommitStatus id from Integer to Long

Use case: oauth2 access limited time tokens which should be updated on regular basis. Supplier allows us to move refresh logic outside client.
Use specified setter to set up supplier after gitlab api object creation.