Suppression of every plots if required

Start by tracing where plots are created and displayed during the batch run, then identify the parameters intended to suppress them. Reproduce the reported QXcbConnection display error on a machine without an X display and define done as completing the run without attempting to open plots when suppression is enabled.

It appears that some plot are sent to output even if the parameters say not to do so.
It prevents running on batch machines.

The output is like this:

MAIN_ID RA DEC RA_PREC DEC_PREC COO_ERR_MAJA COO_ERR_MINA COO_ERR_ANGLE COO_QUAL ... PLX_QUAL PLX_BIBCODE PMRA PMDEC PM_ERR_MAJA PM_ERR_MINA PM_ERR_ANGLE Z_VALUE SCRIPT_NUMBER_ID
"hⓂ️s" "dⓂ️s" mas mas deg ... mas / yr mas / yr mas / yr mas / yr deg
----------- ------------- ------------- ------- -------- ------------ ------------ ------------- -------- ... -------- ------------------- --------- --------- ----------- ----------- ------------ --------- ----------------

• eta01 Dor 06 06 09.3817 -66 02 22.635 14 14 0.052 0.049 90 A ... A 2020yCat.1350....0G 13.575 28.139 0.066 0.061 90 0.0000590 1
  image.shape (4072, 4000)
  2022-03-29 16:01:31 spectractor.tools fit_poly2d_outlier_removal INFO
  Model: Polynomial2D
  Inputs: ('x', 'y')
  Outputs: ('z',)
  Model set size: 1
  Degree: 1
  Parameters:
  c0_0 c1_0 c0_1

  ---

  6.798547405049041 0.05048619956994278 0.10936732041201426
  2022-03-29 16:01:33 spectractor.fit.fitter gradient_descent INFO
  Gradient descent terminated in 18 iterations because the relative change of cost is below ftol=1.25e-05.
  qt.qpa.screen: QXcbConnection: Could not connect to display localhost:28.0
  Could not connect to any X display.
  (base) /pbs/throng/lsst/users/dagoret/desc/AuxTelComm/notebookccdm_gen3/runspectractor_standalone/2022_03>