CLOUDSTACK-5913:API rate limiting throws a different error than expected
when Throttle limit hit in the API.
CLOUDSTACK-5889: UI > Instances > (1) change service offering action: corresonding UI change for new change of scaleVirtualMachine API (that customparameter parameter has been renamed).

(2) detailView: add # of CPU Cores, CPU (in MHz), Memory (in MB).