Bug 1367 - Fix NPE in cors filter

Null was returned by request.getPathInfo, correct method
that decodes relative path to resource is
request.getDecodedRequestURI .

Change-Id: I74964bea07df8fa0e9a37af0effaa2525c6b8b2c
Signed-off-by: Tomas Olvecky <tolvecky@cisco.com>
Merge "Bug 1367 - Fix NPE in cors filter"