Improve pool post processing

Closes #624

See merge request lscsoft/bilby!1096

Fix calibration errors in ROQ

See merge request !1119

Dirichlet Prior: Fix reading prior that has been written to file

See merge request lscsoft/bilby!1128

BUGFIX: Fix marginalized parameter reconstruction with pool

See merge request lscsoft/bilby!1132

multiplying calibration factor in ROQ likelihood

- fix minor bug in multiplying calibration factor in roq.py
- add unit test of likelihood accuracy with non-zero calibration uncertainties
- The ROQ bases used in unit test are updated to ones trained against non-zero
  calibration uncertainties.
- The number of cases tested in TestROQLikelihoodHDF5 is reduced to reduce the
  run time of unit test.
- The error torelance of the unit test is increased as the error torelance of the
  new basis is larger than the previous one.

Update ROQ bases to ones trained against non-zero calibration uncertainties

See merge request !1120

Standardize some common sampler functionality

See merge request !1043

Fix the writing of priors to include the module

See merge request lscsoft/bilby!1127

MAINT: Fix new flake8 failures

See merge request lscsoft/bilby!1130

Flatten the list of rescaled values in a ConditionalPriorDict

See merge request !1112

Add a function to generate component masses

See merge request !1098

Switch the default verbose to True for bilby_mcmc

See merge request !1121

Fix coverage reports

See merge request !1123

containers/v3-dockerfile-test-suite-python38, 39: update ROQ bases to ones trained against non-zero calibration uncertainties

The `generate_component_masses` function generates component masses
from any pair of masses with sufficient information to do so,
`generate_mass_parameters` now takes any pair of mass parameters with
sufficient information and adds all of the mass parameters.

Use marginalized_parameters attribute for reconstruction

See merge request !1111

Merge branch '586-bilby-gw-conversion-module-for-waveforms-which-use-a-custom-reference-frequency' into 'master'

Resolve "`bilby.gw.conversion` module for waveforms which use a custom reference frequency"

Closes #586

See merge request !1080

Fix calibration errors in multiband likelihood

See merge request !1114

Review gw injection examples

See merge request !1074

Add comparison of time delays with lal

See merge request !1110

Allow close but non-identical noise evidence values when comparing for consistent data

See merge request !1113

bilby/gw/likelihood/multiband.py and test/gw/likelihood_test.py: fix calibration errors in multiband likelihood and add tests of multiband likelihood for non-zero calibration errors

Fix getting astropy cosmology for v5.1

See merge request !1109