Objects with trailing whitespace cannot be browsed

[mgeisler]

See the mock environment: an object named foo cannot be visited since trailing whitespace is stripped from the URL.

[mgeisler]

Uploading a file with swift upload test some-file --object-name 'trailing spaces ' and looking at the returned JSON confirms that Swift itself can handle object names with trailing whitespace. So this is not just the simulator being too overbearing.