Fix failing tests related to table counts.

The table counts will not always be exact now that we have more tests
with fixtures. In addition SQLite is being silly again, and requires the
schema to only be made once per test run.

tests/TestCase/Database/Schema/MysqlSchemaTest.php

@@ -228,9 +228,8 @@ SQL;
 		$result = $schema->listTables();
 
 		$this->assertInternalType('array', $result);
-		$this->assertCount(2, $result);
-		$this->assertEquals('schema_articles', $result[0]);
-		$this->assertEquals('schema_authors', $result[1]);
+		$this->assertContains('schema_articles', $result);
+		$this->assertContains('schema_authors', $result);
 	}
 
 /**

tests/TestCase/Database/Schema/PostgresSchemaTest.php

@@ -234,9 +234,8 @@ SQL;
 		$schema = new SchemaCollection($connection);
 		$result = $schema->listTables();
 		$this->assertInternalType('array', $result);
-		$this->assertCount(2, $result);
-		$this->assertEquals('schema_articles', $result[0]);
-		$this->assertEquals('schema_authors', $result[1]);
+		$this->assertContains('schema_articles', $result);
+		$this->assertContains('schema_authors', $result);
 	}
 
 /**

tests/TestCase/Database/Schema/SqliteSchemaTest.php

@@ -193,8 +193,15 @@ class SqliteSchemaTest extends TestCase {
  */
 	protected function _createTables($connection) {
 		$this->_needsConnection();
-		$connection->execute('DROP TABLE IF EXISTS schema_articles');
-		$connection->execute('DROP TABLE IF EXISTS schema_authors');
+
+		$schema = new SchemaCollection($connection);
+		$result = $schema->listTables();
+		if (
+			in_array('schema_articles', $result) &&
+			in_array('schema_authors', $result)
+		) {
+			return;
+		}
 
 		$table = <<<SQL
 CREATE TABLE schema_authors (
@@ -235,10 +242,8 @@ SQL;
 		$result = $schema->listTables();
 
 		$this->assertInternalType('array', $result);
-		$this->assertCount(3, $result);
-		$this->assertEquals('schema_articles', $result[0]);
-		$this->assertEquals('schema_authors', $result[1]);
-		$this->assertEquals('sqlite_sequence', $result[2]);
+		$this->assertContains('schema_articles', $result);
+		$this->assertContains('schema_authors', $result);
 	}
 
 /**