NPE in WinkServletFilter when no dispatcher is available
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                 Key: AMDATU-292
                 URL: http://jira.amdatu.org/jira/browse/AMDATU-292
             Project: Amdatu
          Issue Type: Bug
          Components: Amdatu Web
    Affects Versions: 0.1.0
            Reporter: Bram de Kruijff


There is a race condition where a WinkServletFilter is in the chain but its 
companion WinkServlet has been deregistered. In this case no dispatcher will be 
available and therefore the filter should do a null check and handle 
appropriately. Note btw that we should revisit the whole solution and consider 
a simple requestwrapper instead allowing everybody in the chain to use the 
public path and need not be aware of these Wink internals.

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