Replace skygw_ type prefix with qc_.

- skygw_query_type_t renamed to qc_query_type_t.
- skygw_query_op_t renamed to qc_query_op_t.

query_classifier/test/classify.c

@@ -108,7 +108,7 @@ int main(int argc, char** argv)
 			memmove(strbuff,tok + 1, strsz - qlen);
 			strsz -= qlen;
 			memset(strbuff + strsz,0,buffsz - strsz);
-			skygw_query_type_t type = qc_get_type(buff);
+			qc_query_type_t type = qc_get_type(buff);
 			char qtypestr[64];
 			char expbuff[256];
 			int expos = 0;