CDB-1565 Add parameter to force batch geocodes on CartoDB::Geocoder
CDB-1565 #resolve Heartbeat check for HERE geocoding services

script/geocoder_test <environment> <non-batch>

environment: Rails environment to read config from
non-batch: test non-batch API (defaults to batch if not present)

Requires valid HERE API keys on config/app_config.yml (see geocoder section)

Checks responses, processing and responses from HERE geocoding APIs,
both batched and non-batched.