[Axis2] Bring back -xc option for java2wsdl

[Pétur Runólfsson <pe...@betware.com>]

Hi,

The -xc option to java2wsdl seems to have stopped working in 1.5, but the option is still reported in the help message for java2wsdl, so this doesn't seem intentional. I have added this to JIRA as AXIS2-4382.

The code that processed the extra classes seems to have been removed from DefaultSchemaGenerator. The attached patch restores the handling of extra classes. The code differs quite a lot from the original, since all the surrounding code has changed so much, but I think it captures the intent.

Regards,

Pétur Runólfsson
Betware

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