Improve view service admin and add sample view server

[mandy-chessell]

Description

This PR updates the view services administration calls:

• It updates the server-side request body used when configuring a view service to be ViewServiceRequestBody rather than ViewServiceConfig. There are three reasons for this change:
  • It matches the code in the admin services client
  • It makes the style of configuing the view services consistent with configuring the other registered services - ie access services, engine services and integration services.
  • The ViewServiceConfig structure includes many details that are filled in by the platform - and should not be supplied by the caller.
• The ViewServiceRequestBody has been updated to optionally take a list of resource endpoints.
• The "configure all view services" request has been restored. This configures all registered view services, passing the supplied request endpoints and view service options to all view services. If the view service does not use resource endpoints, it ignores them.

In addition, there are further improvements in administration:

• The connector configuration factory only adds the connectorProviderClassName to connector types that are generated for a server's configuration document. This reduces the size of, for example, a metadata access store's configuration document by about a third, just because of the smaller Kafka connection object.
• It is possible to add a default configuration document to the application.properties file to say, preconfigure the event bus defaults for all new servers.

There are two new sample server configurations in the omag-server-platform distribution: one for a view server and te other for an engine host. The existing simple-metadata-store, active-metadata-store and integration-daemon server configurations have be recreated to benefit from the more slim-line connector types.

Related Issue(s)

None

Testing

FVTs plus testing using the new sample server configurations

Release Notes & Documentation

This is the updated documentation for configuring the view services:

• https://egeria-project.org/guides/admin/servers/configuring-a-view-server/#configure-the-view-services
  It corrects the output of the retrieval calls and adds descriptions for the ViewServiceRequestBody.

This is the description of the new properties for the application.properties file:

• https://egeria-project.org/guides/admin/configuring-the-omag-server-platform/#configuring-the-default-configuration-document

Additional notes

None