v.8.1.0

Improvements:

1. [LUNA-8472] Changed default LUNA Image Store bucket names to bucket-samples, bucket-bodies-samples, bucket-image-origin and bucket-objects.

2. [LUNA-8558] Added handler_ids query parameter support for GET /handlers endpoint. See GET /handlers for details.

Migration:

See a migration manual.

[LUNA-8472] See a migration manual.