Removed duplicated ordering.background task in docker compose files

Added signalr client for MVC
Added signalr hub
Added signalr events when order status changes

configuration to ocelot passed through a k8s volume

Error in VSTS:
3 error(s), 1 warning(s)
Phase 1 - 3 error(s), 1 warning(s)
Version in "/opt/vsts/work/1/s/docker-compose.yml" is unsupported. You might be seeing this error because you're using the wrong Compose file version. Either specify a supported version (e.g "2.2" or "3.3") and place your service definitions under the `services` key, or omit the `version` key and place your service definitions at the root of the file to use version 1.
For more on the Compose file format versions, see https://docs.docker.com/compose/compose-file/
/usr/local/bin/docker-compose failed with return code: 1

Remove explicitly copied dependencies, copy entire solution
into the conainter and depends on the cache to reduce build
time.

Addd temporary solution file which does not contains the
dcproj file to work around the issue that the dotnet cli
cannot handle dcproj.

1. Changes the build context of all services to the root level to be
able to access the dependencies for each project.
2. Commented out the prepublish scripts, these steps are moved into the
Dockerfile

Did not change any script yet, need help to identify what scripts we
need to change.

fix mssql version