timezone: improving errors handling
timezone: improving errors handling

Change-Id: I24765f7ff4eaf9474585446fe1c66d09048b01a2
Bug-Url: https://bugzilla.redhat.com/1318350
Signed-off-by: Simone Tiraboschi <cb03129c66ba4da7ba7044049d0f43907bf857bb@redhat.com>

oVirt/ovirt-hosted-engine-setup,oVirt/ovirt-hosted-engine-setup