Update to NServiceBus.RabbitMQ 10.0.0 and use management client

[TravisNickels]

This pull request upgrades the RabbitMQ transport to version 10.

The new transport version brings a new requirement for ServiceControl to operate: The RabbitMQ management plugin must be enabled, and the plugin's statistics and metrics collection must not be disabled.

By default, the settings to access the API will be inferred from the connection string, but the following new connection string settings have been added if custom values are needed:

• ManagementApiUrl
• ManagementApiUserName
• ManagementApiPassword

The transport also does delivery limit validation by default, but that can be controlled with the new ValidateDeliveryLimits connection string setting.

Other changes in this PR:

• ServiceControl.Transports.RabbitMQ now has access to the transport internals, which means all the code previously duplicated from the transport has been removed.
• The RabbitMQQuery and QueueLengthProvider classes now access the management API through the transport's management client instead of having their own custom logic.
  • The transport customization classes have been updated to allow access to the ManagementClient instance that the transport creates during initialization.
• The separate licensing component settings to access the management API are no longer used. They have been replaced by the above mentioned connection string settings.
  • If any existing settings are found during the upgrade process, they are migrated to the connection string instead.
• The DisableRemoteCertificateValidation and UseExternalAuthMechanism are once again working properly instead of being ignored.

Related Documentation:

• Upgrade guide
• Connection string options