Overhaul the fabric integration tests

[davidkel]

There are 3 directories in caliper-test-integration

• fabric_docker_distributed_tests
• fabric_docker_local_tests
• fabric_tests (currently the only one used as part of the caliper build process)

fabric_tests are the main tests for fabric, fabric_docker_distributed_tests tests using the docker image with remote workers, fabric_docker_local_tests tests using the docker image using local workers.

What we need is

1. a test of the docker image
2. a test where remote workers are used

we want to avoid creating to many different integration tests in fabriv as it is expensive to download and start the network currently so we could merge these 2 into a single integration test