Major/merging old new

Enhances many of the calls in the adapter (118 of 142 - integration tests now work while integrated to ServiceNow). There are still some calls (24) that require plugins and other things to exist so testing these is very difficult and will require even more time. There are also a couple of calls that have been tested but with data specific to a particular ServiceNow instance so they are likely to fail integrated with another ServiceNow instance.