Undisable WebAppContextTest.testGetResourcePaths

[janbartel]

Undisable the ee9 WebAppContextTest.testGetResourcePaths test.

I discovered that in ee9 we have kept the call to URIUtil.canonicalizePath method in the ContextHandler.Context.getResource*() methods, however the meaning of this method changed in jetty-12: in older jetty versions it did the same as the new URIUtil.normalizePath method, but in jetty-12 it really does do the full canonicalization. I believe these ee9 methods need to use URIUtil.normalizePath methods instead. Worth noting that the ee10 ServletContextHander.ServletContextAPI methods do use URIUtil.normalizePath instead.