MXS-1278: Sql mode must be specified explicitly

The default sql mode must now be provided explicitly when the query
classifier is setup. This is in preparation for "sql_mode" becoming
a global configuration parameter of MaxScale.

query_classifier/test/crash_qc_sqlite.c

@@ -41,7 +41,7 @@ int main()
 
     set_libdir(strdup("../qc_sqlite"));
 
-    if (qc_setup("qc_sqlite", NULL) && qc_process_init(QC_INIT_BOTH))
+    if (qc_setup("qc_sqlite", QC_SQL_MODE_DEFAULT, NULL) && qc_process_init(QC_INIT_BOTH))
     {
         const char s[] = "SELECT @@global.max_allowed_packet";