Run the classic Minion in DEV with Skaffold

Some features of Horizon are designed around communication with Minion instances, such as the icmp/ping command.

Running the classic Minion service in DEV enables development and testing of Horizon Stream.  Requirements:

• Minion instance runs via skaffold for development
• Minion instance runs during build-time-integration-tests for use with Cucumber
• (OPTIONAL) Existing published docker image for Minion used to run instances
• Minion instance can be reached via gRPC by Horizon Stream