Changes to Launch Agent

added the new optional request property gpus_per_node

removed the enum value dtn01 of the request property machine

removed the enum value dtns of the request property machine

added the new required request property num_nodes

removed the request property num_agents

removed the request property reservation

added the new optional request property extra

added the new required request property compute_type

added the new required request property duration

added the new required request property num_agents

removed the request property account

removed the request property constraint

removed the request property num_nodes

removed the request property qos

removed the request property walltime

endpoint added