Charles Chan
Committed by Gerrit Code Review

[ONOS-641] Update unit tests to include IPv6 as well

- HostMonitorTest
    Add more IPv6 related test cases
- HostLocationProviderTest
    Add more test cases, including:
        NS/NA
	RS/RA
	DAD
	IPv6 unicast
	IPv6 multicast
	IPv4
- HostLocationProvider
    Minor indent fix

Change-Id: Id4c3af430862c61872ccaa98beac3a47313206ac