CLOUDSTACK-4058: UI > Host detail page > (1) Add Hypervisor, HypervisorVersion field.
(2) Remove CloudstackVersion field.
FileUtil: use commons-io FileUtils

- removed the method body ot FileUtil.copyFile and replaced with FleUtils.copyFile

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
CLOUDSTACK-5089: fixed VPCDao to set the accountId field correctly