Fix migration scripts to use the new api #1262

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10 warnings

`connection_capacity` has conflicting `description` across duplicate template entries!

`connection_conv_cap_to_flow` has conflicting `description` across duplicate template entries!

`connection_emergency_capacity` has conflicting `description` across duplicate template entries!

`connection_flow_coefficient` has conflicting `description` across duplicate template entries!

`max_res_shutdown_ramp` has conflicting `description` across duplicate template entries!

`max_res_startup_ramp` has conflicting `description` across duplicate template entries!

`max_shutdown_ramp` has conflicting `description` across duplicate template entries!

`max_startup_ramp` has conflicting `description` across duplicate template entries!

`min_res_startup_ramp` has conflicting `description` across duplicate template entries!

`min_startup_ramp` has conflicting `description` across duplicate template entries!