Allow override of $TRANSPORT_COMMAND in generic send script
Created by: zlamalp
- Move definition of $TRANSPORT_COMMAND before import of service specific configuration (/etc/perun/services/service_name/service_name.conf) in order to allow SSH param overrides.
- It's needed at VŠUP where one service calls sudo command on destination machine, but it requires forcing virtual tty by adding "-t" ssh param.