Create distributable HTTP Client for all services provided by the module mod-source-record-storage

Implementation should be based on Feign Client

https://github.com/OpenFeign/feign
https://mvnrepository.com/artifact/io.github.openfeign

*Steps to implement*

1. Change module source code repository structure to contain 2 sub-folders: server & client
2. Change POM accordingly, create new POMs for each module
3. Move the module implementation to the "server" folder
4. Create a client implementation & tests

*Acceptance criteria*

• Module structure changed
• Client is provided as a separate java library
• a Jenkins job for server & client is green
• Both server & client jars are published into the artifactory
• Docker image for server module is built correctly
• The module is available on the staging environment
• Unit tests as a must have requirement
• Add extensive documentation for client interface and usage examples.

An alternative approach is to keep all in one level repository. In this case the consumer should add a dependency on the module itself. TBD!
FYI: The lightweight version of the built artifact is published into the Nexus artifactory, not a fat one.