Expose Collaboration Context

This MR exposes and sanitizes collaboration context, and makes it available to be consumed by other services.

The header will have 2 directives (comma separated): x-collaboration: id=<collaboration-id>,application=<app-name>;

Request Description

Directive	Optionality	Description
id	Mandatory	ID of the collaboration to handle the request against.
application	Mandatory	Name of the application sending the request
Other directives	Optional	Other directives such as transaction ID to handle this request against.

References

• ADR
• Implementation in storage