Add mp plugin and added formatted bucket name

[blootsvoets]

• TargetStorage now takes the first part of the path as the target bucket name.
• Gave RecordPathFactory some more hardcoded config.
• Path formatting can now make use of coroutines.
• Updated dependencies.

TODO:

• Depends on release of https://github.com/RADAR-base/ManagementPortal/tree/update-radar-auth-logic
• Add configuration documentation
• Add MP tests and bucket name tests.

[blootsvoets]

fixes #65