CR-4412 OPENIG-263 OAuth2ResourceServerFilter should place the AccessToken in a configurable place
- Renamed ACCESS_TOKEN_KEY to DEFAULT_ACCESS_TOKEN_KEY.
- Target is now optional/customizable for user. Default to ${exchange.oauth2AccessToken}.




git-svn-id: https://svn.forgerock.org/openig/trunk@548 dbb9e58e-28e6-4ce0-90e8-f11d9605b710