I have attached a patch which adds extension processing in WebServiceBindingProcessor
Patch applied, thanks for the update Rashmi.
It turns out this change breaks the WS binding compliance test BWS_2016.
The fail is while processing a composite which uses the wsdli:wsdllocation attribute - http://tools.oasis-open.org/version-control/svn/sca-bindings/TestCases_BWS/BWS_2016/src/main/resources/Test_BWS_2016.composite
So it looks like the code in WebServiceBindingProcessor around line 276 needs to also take account of that spec defined attribute in the http://www.w3.org/ns/wsdl-instance namespace.
The WSDLI check was added in r1200809 to fix the compliance fail.
Patch applied, thanks for the fix Rashmi