TableName rule should not derive to Identifier '.' '*'

[kennytm]

In fix of #188, the following new rule was introduced:

parser/parser.y

Lines 4886 to 4898 in 690470b

	TableName:
	Identifier
	{
	$$ = &ast.TableName{Name:model.NewCIStr($1)}
	}
	| Identifier '.' Identifier
	{
	$$ = &ast.TableName{Schema:model.NewCIStr($1), Name:model.NewCIStr($3)}
	}
	| Identifier '.' '*'
	{
	$$ = &ast.TableName{Name:model.NewCIStr($1)}
	}

but this affects all uses of TableName and leads to some non-sense syntax being accepted, e.g.

ANALYZE TABLE a.*;
-- should throw syntax error, but accepted and treated as equivalent to ANALYZE TABLE a;

We should create a separate rule for DELETE statement instead, and revert the TableName change.

[spongedu]

This issue seems be fixed in #521 . I've added some related test cases in that pr. PTAL. @kennytm