gstlal_ll_dq: output psd to kafka
The PSD is measured every 100s by gstlal_ll_dq and stored on disk and Influx. This merge request is to also output the PSD to Kafka at the same time, so that it can be used by the Test Suite.
The PSD is measured every 100s by gstlal_ll_dq and stored on disk and Influx. This merge request is to also output the PSD to Kafka at the same time, so that it can be used by the Test Suite.