Error range for src-annotation src-annotation

[angelozerr]

Given this XSD file:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
	<xs:element name="root-element">
	<xs:annotation>
		<xs:appInfo>
			
		</xs:appInfo>
	</xs:annotation>	
	</xs:element>
</xs:schema>

``
xs:appInfo report an error because it should be `xs:appinfo`, the error range should higlight the `xs:appInfo`. We could provide too code action with similar values and REPLACE with `xs:appinfo`.

See eclipse-pde/eclipse.pde#294

[raj99195]

you should write app:info instead of app:Info.

[datho7561]

Clsoed by #1581