CLIENTAPI-22: ParamMismatchException doesn't propagate to PHP from ParameterSet::add*()
CLIENTAPI-22: ParamMismatchException doesn't propagate to PHP from ParameterSet::add*()

Adds throw declarations to C++ client library so SWIG will pick up on the fact that those methods should throw exceptions.


creative-quant/voltdb-client-cpp,creative-quant/voltdb-client-cpp,creative-quant/voltdb-client-cpp,creative-quant/voltdb-client-cpp