The following style updates have been made in anticipation of
substantive changes in subsequent commits:
- organize imports
- correct whitespace errors (leading spaces in code, tabs in Javadoc)
- wrap Javadoc at 90 chars; make imperative ("Return" vs. "Returns")
- use conventional constructor argument wrapping
A serialVersionUID has also been added to RestClientException and its
ResourceAccessException subclass for consistency with the rest of that
same exception hierarchy.
Issue: SPR-7938
bca2357be7