lg_sv: implemented get_metadata in nearby_panos
lg_sv: implemented get_metadata in nearby_panos

Returns None when there is no metadata/panoid and when the panoid
doesn't match the panoid in metadata. Removed that exact same logic
from find_closest and called self.get_metadata instead.

EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes,EndPointCorp/lg_ros_nodes