Added test for Function.get_parameters().
Added test for Function.get_parameters().

adamgreenhall/sqlparse,zhongdai/sqlparse,Yelp/sqlparse,payne/sqlparse,andialbrecht/sqlparse,adamgreenhall/sqlparse,MariaPet/sqlparse,Yelp/sqlparse,tailhook/sqlparse,Yelp/sqlparse,AndiDog/sqlparse,tailhook/sqlparse,benekastah/sqlparse,zhongdai/sqlparse,zhongdai/sqlparse,tailhook/sqlparse,actsasgeek/sqlparse,MariaPet/sqlparse,vmuriart/sqlparse,AndiDog/sqlparse,adamgreenhall/sqlparse,AndiDog/sqlparse,payne/sqlparse,actsasgeek/sqlparse,payne/sqlparse,actsasgeek/sqlparse