update test harness + use eureka straight from cloudbees
remove useless yum installs
add testing section to readme
Merge branch 'master' of https://github.com/hudl/fargo
Added tests for the new EurekaConnection methods: TestReregistration, TestDeregistration, TestUpdateStatus.
Although I had to turn off TestDeregistration since that triggers flakiness in other tests.
Also removed first So() in TestMetadataReading since that was causing Convey errors for me and since that
path is already tested in TestConnectionCreation which I moved to earlier in the file.