Add test of mtrain_regimen cadence that uses mtrain_api as a fixture through docker-compose

[nicain]

• [ ] Edit mtrain_regimens make file to create a new rule that:
  • [ ] Checks out mtrain_api
  • [ ] Starts a fixture network using docker-compose
  • [ ] Copy over test_regimen into the running network-fixture
  • [ ] Run the test inputs into the fixture; one of the inputs of this will be the current named regimen on the current checkout out commit being tested
  • [ ] grab the standard out of the run
• [ ] assert that the standard out meets the expected behavior for the current commit of mtrain_regimens

[mochic]

thanks for holding my hand