Fix tests

please review

http://cruise.infopark:3000/project/show_build/18750
2 * green: activeresource 3.2 and 3.1 (run on ruby 1.8.7-p357)
1 * red: activeresource 3.0 (run on ruby 1.9.3-p327 @ minion 305)

don't know why 1 bucket was executed on ruby 1.9.3 and why there are encoding errors.
my local tests with 1.9.3p374 run like a charm: all green.


http://cruise.infopark:3000/project/show_build/18755
same commit: all green