CONNECT: calculate table_name from the path

CONNECT used to compute table file path as
table->s->db_name + table->s->table_name
instead of using table->s->path. This was incorrect and now it breaks
for temporary tables during ALTER TABLE.

Temporarily "fix" it by making CONNECT to use what it always used
as a table name - the last component in the table->s->path.

Author: vuvova

storage/connect/ha_connect.cc

@@ -1815,7 +1815,9 @@ PCSZ ha_connect::GetDBName(PCSZ name)
 
 const char *ha_connect::GetTableName(void)
 {
-  return tshp ? tshp->table_name.str : table_share->table_name.str;
+  const char *path= tshp ? tshp->path.str : table_share->path.str;
+  const char *name= strrchr(path, '/');
+  return name ? name+1 : path;
 } // end of GetTableName
 
 char *ha_connect::GetPartName(void)