Metacat

Create a propertyService.getTestInstance method to facilitate unit tests

Pulled common eml creation and metacat client methods into the MCTestCase base class. Eventually, all test cases should use these common methods.

Add common test case db select, query and update methods. Add http post method.

Have test cases read properties from configured metacat.properties file.

Move common constants into MCTestCase base class

Make debug method static

Add empty constructor

Create TestCase base class that makes sure PropertyService is instantiated and implements a debug() method that allows us to print to stderr