PSD can be created using data when the IFOs are not locked

The PSD for a trigger is created by bilby_pipe by using the previous X seconds of data. However, there are no errors/warnings are thrown by bilby_pipe for if the IFO is not locked during the entire length of time. This can result with PSDs like the following:

We could use GWpy's DataQualityFlag to see if the IFOs are in a "good state".

Below is an example of a plot made using the DataQualityFlag. The green areas are where the IFOs are locked.