gateway-http append forward-slash(/) to jaxrs extensionMappings url.

Issue

• cxf extension mapping don't work as expected if behind fabric http gateway.Fabric http gateway adds trailing "/" even on extension mappings.
• GET /x/y/.pdf produces /x/y/.pdf/ --> is not found by extensionMappings
• We have to double every extensionMapping so that it works with and without http gateway which is ugly.
• blueprint.xml

<jaxrs:server id="restService" address="/CxfRsRouterTest/rest" >
    <jaxrs:serviceBeans>
      <ref component-id="customerService"/>
    </jaxrs:serviceBeans>
    <jaxrs:extensionMappings>
         <entry key="pdf/" value="application/pdf" /> <!-- Fabric http gateway adds trailing "/" even on extension mappings -->
         <entry key="pdf" value="application/pdf" />
    </jaxrs:extensionMappings>
</jaxrs:server>