updated tests to use Assert.That pattern for consistency, fixed bad unit test, was not setting statsdserver host param when testing valid metrics config
updated tests to use Assert.That pattern for consistency, fixed bad unit test, was not setting statsdserver host param when testing valid metrics config

DarrellMozingo/statsd-csharp-client,Pereingo/statsd-csharp-client,goncalopereira/statsd-csharp-client