Improvements to fail fast

[kennsippell]

There are a class of "setup and mocking" errors which currently throw when performing actions like getContactSummary or getTasks etc. Mocking "setup and mocking" errors should be caught as early as possible and the framework should "fail fast".

This likely is a breaking change requiring more validation in setters and the constructor

Examples

• harness.user = {} should throw because the user contact doc must have an _id