Replace provinceCode with the more general subcountryCode

subCountryCode replaces provinceCode but is more general. For example, the primary subdivisions of the USA are called states, not provinces and in Switzerland, primary subdivisions are called Cantons).

1. In the source code, change all references from stateProvTerr to subCountryCode.

2. Parameterize the subCountryCode property name to be used in all output schemas and fault messages. The parameter could be called subCountryCodeLabel and maintained in the global parameters list by the geocoder admin app. Initially, valid values are province and state. The suffix "Code" should be automatically appended to subCountryCodeLabel when generating output.

3. For backward compatibility, a GET request should be able to use either provinceCode or subCountryCode to specify a subCountryCode