feat(repodb): add user related information to repodb (#1317)

Initial code was contributed by Bogdan BIVOLARU <104334+bogdanbiv@users.noreply.github.com>
Moved implementation from a separate db to repodb by Andrei Aaron <aaaron@luxoft.com>

Not done yet:
- run/test dynamodb implementation, only boltdb was tested
- add additional coverage for existing functionality
- add web-based APIs to toggle the stars/bookmarks on/off

Initially graphql mutation was discussed for the missing API but
we decided REST endpoints would be better suited for configuration



feat(userdb): complete functionality for userdb integration

- dynamodb rollback changes to user starred repos in case increasing the total star count fails
- dynamodb increment/decrement repostars in repometa when user stars/unstars a repo
- dynamodb check anonymous user permissions are working as intendend
- common test handle anonymous users
- RepoMeta2RepoSummary set IsStarred and IsBookmarked



feat(userdb): rest api calls for toggling stars/bookmarks on/off



test(userdb): blackbox tests



test(userdb): move preferences tests in a different file with specific build tags



feat(repodb): add is-starred and is-bookmarked fields to repo-meta

- removed duplicated logic for determining if a repo is starred/bookmarked

Signed-off-by: Laurentiu Niculae <niculae.laurentiu1@gmail.com>
Co-authored-by: Andrei Aaron <aaaron@luxoft.com>

pkg/test/common.go

@@ -657,6 +657,7 @@ func GetRandomImageComponents(layerSize int) (ispec.Image, [][]byte, ispec.Manif
 				Size:      int64(len(layers[0])),
 			},
 		},
+		MediaType: ispec.MediaTypeImageManifest,
 	}
 
 	return config, layers, manifest, nil