Fix unqualified access to implicit request object ...

If the OpenId request object parameter is used it hides the implicit
request object, which in turn causes the expression to fail.
To circumvent this we need to access the request object through the
pageContext.

openid-connect-server-webapp/src/main/webapp/WEB-INF/views/approve.jsp

@@ -36,7 +36,7 @@
 		</h1>
 
 		<form name="confirmationForm"
-			action="${request.getContextPath().endsWith('/') ? request.getContextPath() : request.getContextPath().concat('/') }authorize" method="post">
+			action="${pageContext.request.contextPath.endsWith('/') ? pageContext.request.contextPath : pageContext.request.contextPath.concat('/') }authorize" method="post">
 
 			<div class="row">
 				<div class="span5 offset1 well-small" style="text-align: left">