Fix page_owner_sort tool to sort appropriately
JIRA: https://issues.redhat.com/browse/RHEL-3910
Nanosecond timestamps were added to the output for page_owner, but the
tool itself was not updated to handle the new addition. Nanosecond
timestamps do not really add anything to the page_owner output, so
we are removing them and also updating the tool.
Signed-off-by: Audra Mitchell audra@redhat.com