All of the changes necessary to build and run itacac instead of itac. Note that itac will no longer work after this commit

- obsolete method of SnglInspiralTable class.

- use ligo.lw.table's new .columnnamesreal to get true column names

- fix process_id column name in sngl_inspiral table

far.py: change initial guess for extinction model to 5 which splits the difference between its previous value of 1 and its current value of 10.  We found some offline cases where 10 wasn't so great and 1 wasn't so great online. Hopefully 5 is better. FIXME ditch this scipy routine.

- bump minimum required python-ligo-lw to 1.5.3 (but don't enable check for it, yet)

- add M4 code to check for a functioning minimum required version of
  python-ligo-lw.  not yet used

- add ligolw_no_ilwdchar converions

- oops, I was zeroing the row count before returning

- sngl_inspiral's process column is "process:process_id"

- this converts gstlal_snglinspiral_array_from_file() to a wrapper of
  ezligolw isntead of lal's XML reading functions

- use .copy() method of Table objects to obtain copy to ensure column names
  are always the same as the original.

- update for ilwd:char --> int conversion

- this patch adds a translator to convert gracedb event uploads from
  integer ID format to the legacy ilwd:char ID format.  it can be reverted
  if gracedb is updated to accept integer ID format files

- gstlal-calibration is not touched

REVERT ME: lloidparts.py: raise the snr threshold to 4 instead of 3.5 to make online running more stable until coincidence / other python stuff is faster

- new segmentlist method implementing solution to problem that exists in several codes.  switching to it addresses a FIXME.

gstlal_ll_inspiral_pipe: scale up number of aggregator jobs to keep up with real-time, gstlal_ll_inspiral_aggregator: add more specific group_id to not conflict with other aggregator jobs

Enabling rpmbuild in the CI pipeline. Modfied burst's spec.in to remove undefined doxygen dependency and strange environment script. Implemented --disable-massmodel in gstlal-inspiral.spec.in to limit the size of the rpm

lloidhandler.py: change structure of data stored and pushed to kafka within EyeCandy, change name of state routes, add logic to handle sampling rates of state info here rather than downstream

gstlal_ll_inspiral_pipe: modify number of aggregation jobs, add option to switch between influx and hdf5 agg backends