Make service-auth-token configurable in the manifest

[Finishes #66689260]
Add acceptance tests

- Confirm that the v1-dummy-broker advertises its catalog successfully
- Confirm that it's possible to create an instance of the
  v1-dummy-broker service

[#66815270]
Add section to readme about running acceptance tests

[#66815270]
Poll ever 5 seconds instead of ever 10ms

[#66815270]
Keep the results folder
Output JUnit report to reports folder and 'go fmt'

bin/test now formats the code in the tests folder
[#66815270]