Prevent double-encoding of URLs in config-prettyfaces

[ajkyffin]

URLs are being double-encoded, resulting in e.g. %2520 for a space character.

The URL returned by ExtractedValuesURLBuilder.buildURL is already encoded here:

rewrite/config-prettyfaces/src/main/java/com/ocpsoft/pretty/faces/beans/ExtractedValuesURLBuilder.java

Line 89 in b33b345

result = parser.getMappedURL(parameterValues).encode();

so it should not be encoded again.