CLOUDSTACK-2303: upgrade failed from 2.2.14 to 4.1.0 - part2

Signed-off-by: Chip Childers <chip.childers@gmail.com>
Summary: Release old DHCP entries

Detail: Refresh dnsmasq with updated entries live, no outage

BUG-ID: CLOUDSTACK-2299
Submitted-by: Dennis Lawler <dlawler@gmail.com>
Signed-off-by: Marcus Sorensen <marcus@betterservers.com> 1367611792 -0600
CLOUDSTACK-2160:Refresh button functionality for security groups and statistics tab