BUG#5973 ndb table belonging to different database shows up in SHOW TABLES

mysql-test/r/ndb_autodiscover.result:
  Added test cases to check that SHOW TABLES  only show tables in the selected  db.
mysql-test/t/ndb_autodiscover.test:
  Added test cases to check that SHOW TABLES  only show tables in the selected  db.
sql/ha_ndbcluster.cc:
  Only find files for the current db
  Only add files to files list which can be created i.e has a valid frm blob. This prevents NDB$BLOB tables and tables created from NdbApi to show up.

mysql-test/r/ndb_autodiscover.result

@@ -330,6 +330,34 @@ show status like 'handler_discover%';
 Variable_name	Value
 Handler_discover	0
 drop table t6;
+show tables;
+Tables_in_test
+create table t1 (a int) engine=ndb;
+show tables;
+Tables_in_test
+t1
+create database test2;
+use test2;
+show tables;
+Tables_in_test2
+select * from t1;
+ERROR 42S02: Table 'test2.t1' doesn't exist
+create table t2 (b int) engine=ndb;
+use test;
+select * from t1;
+a
+show tables;
+Tables_in_test
+t1
+drop table t1;
+use test2;
+drop table t2;
+drop database test2;
+show databases;
+Database
+mysql
+test
+use test;
 CREATE TABLE t9 (
 a int NOT NULL PRIMARY KEY,
 b int

mysql-test/t/ndb_autodiscover.test

@@ -427,6 +427,31 @@ show status like 'handler_discover%';
 
 drop table t6;
 
+#####################################################
+# Test that only tables in the current database shows 
+# up in SHOW TABLES
+#
+
+show tables;
+
+create table t1 (a int) engine=ndb;
+show tables;
+create database test2;
+use test2;
+show tables;
+--error 1146
+select * from t1;
+create table t2 (b int) engine=ndb;
+use test;
+select * from t1;
+show tables;
+drop table t1;
+use test2;
+drop table t2;
+drop database test2;
+show databases;
+use test;
+
 ######################################################
 # Note! This should always be the last step in this 
 # file, the table t9 will be used and dropped 

sql/ha_ndbcluster.cc

@@ -3844,6 +3844,10 @@ int ndbcluster_find_files(THD *thd,const char *db,const char *path,
     NdbDictionary::Dictionary::List::Element& t= list.elements[i];
     DBUG_PRINT("info", ("Found %s/%s in NDB", t.database, t.name));     
 
+    // Add only tables that belongs to db
+    if (my_strcasecmp(system_charset_info, t.database, db))
+      continue;
+
     // Apply wildcard to list of tables in NDB
     if (wild)
     {
@@ -3938,7 +3942,7 @@ int ndbcluster_find_files(THD *thd,const char *db,const char *path,
   while ((file_name=it2++))
   {  
     DBUG_PRINT("info", ("Table %s need discovery", name));
-    ha_create_table_from_engine(thd, db, file_name, true);    
+    if (ha_create_table_from_engine(thd, db, file_name, true) == 0)
       files->push_back(thd->strdup(file_name)); 
   }