Previously, when UriModifyingOperationPreprocessor modified a URI it
would always encode it. However, the URIs being modified will always
have been encoded, resulting in double-encoding of the URI.
This commit updates UriModifyingOperationPreprocessor to tell
UriComponentsBuilder that the components have already been encoded.
This ensures that they are not encoded for a second time when the URI
is being built.
Closes gh-211
488d36d4bf