BROOKLYN-32: change geo lookup to utrace

MaxMind GeoIP package license is LGPL2.1, which is incompatible with the
Apache license, therefore we need to remove it.
BROOKLYN-32: Remove MaxMindHostGeoLookup class

MaxMind GeoIP package license is LGPL2.1, which is incompatible with the
Apache license, therefore we need to remove it.
BROOKLYN-32: Remove MaxMind GeoIP source code

MaxMind GeoIP package license is LGPL2.1, which is incompatible with the
Apache license, therefore we need to remove it.
Merge and close PR #140