FirstOrderBags.getFunctions(DatatypeFactory<AV>) and fixed license
header)
- Changed request filter IDs:
	- urn:ow2:authzforce:xacml:request-filter:default-lax ->
urn:ow2:authzforce:feature:pdp:request-filter:default-lax
	- urn:ow2:authzforce:xacml:request-filter:default-strict ->
urn:ow2:authzforce:feature:pdp:request-filter:default-strict
    - urn:ow2:authzforce:xacml:request-filter:multiple:repeated-attribute-categories-strict
->
urn:ow2:authzforce:feature:pdp:request-filter:multiple:repeated-attribute-categories-strict
    - urn:ow2:authzforce:xacml:request-filter:multiple:repeated-attribute-categories-lax
->
urn:ow2:authzforce:feature:pdp:request-filter:multiple:repeated-attribute-categories-lax
- Fixed doc in pdp.xsd on PDP extensions