[5.3] test: MysqlJoinDeleteWithAlias

[puggan]

Unit test for bug: invalid sql when join and alias are used in delete-queries.

Exemple code:

DB::table('join_test AS a')->join('join_test AS b', 'a.id', '<', 'b.id')->delete();

Should create a query like:
DELETE a FROM join_test AS a...

Currently creates a query like:
DELETE join_test AS a FROM join_test AS a

This unit test checks that the original table name isn't included before the FROM when join and alias are used.

[taylorotwell]

@themsaid can you look at getting a fix for this in 5.4?

[themsaid]

sure thing