Add sample integration with Consul configuration to demo app

Using the Consul setup, add a sample configuration value to our SpringBoot demo app (source code here: https://git.cleverthis.com/cleverthis/clevermicro/amq-adapter-java/-/tree/develop/clever-book?ref_type=heads) to demonstrate our ability to read a configuration from central Consul instance. If scope permits, add multiple data types, like:

• String
• Number
• Map
• List
• Arbitrary Object(JSON?)