Fix error handling for errors happening in nuxeo restful phase listener

The error handling methods put the system in a bad state when issuing an error in RestFulPhasListener class. This can be reproduced trying to access a page with an unknow view id, or trying to acess a document without READ rights.

http-127.0.0.1-8080-1 - 2009-10-02 15:38:01,895 ERROR [org.jboss.seam.web.ExceptionFilter] handling uncaught exception
java.lang.IllegalStateException
at com.sun.faces.context.FacesContextImpl.assertNotReleased(FacesContextImpl.java:395)
at com.sun.faces.context.FacesContextImpl.getExternalContext(FacesContextImpl.java:147)
at com.sun.faces.util.RequestStateManager.getStateMap(RequestStateManager.java:276)
at com.sun.faces.util.RequestStateManager.remove(RequestStateManager.java:243)
at com.sun.faces.context.FacesContextImpl.release(FacesContextImpl.java:345)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:283)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)