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