Add new -rsh/--remoteServiceHosts command line flag to set host names required when service is running remotely

[lenny-goodell]

🚀 Feature Request

Relevant Package [REQUIRED]

This feature request is for `flags`

Description [REQUIRED]

When running a device or any other service remote from the core services (Core Metadata, Redis, etc) the name of the host where the core services must be set for the following:

• Clients
  • Core Metadata
  • Core Data
  • Core Command
  • etc
• MessageBus
• Database
• Registry

In addition the Service Host must be set to the name of the local system for device service to receive commands from Core Command and the Service ServerBindAddr must be set so that in docker the appropriate host name is used the bind to for the WebServer.

Describe the solution you'd like

Managing all the above host name changes is complex and cumbersome and would be simplified by having a command line flag to takes the host name of the local system and system core services are running and sets all values appropriately. Suggest the flag be called `-rsh/--remoteServiceHosts` which takes the host names in the following format:

• <local system host name>:<core service host name>:<server-bind host name>
• Example: --remoteServiceHosts=192.0.1.8,192.0.1.21,localhost

Also, must have an environment variable override named EDGEX_REMOTE_SERVICE_IPS

Describe alternatives you've considered

Have you considered any alternative solutions or workarounds?