Pull request #1003: CAS-14415
Merge in CASA/casa6 from CAS-14415 to master
* commit '2295836ba3f18750b5aba11b737f3795c58ad09e':
Update imports in compare.py
Bring update from testhelper.py compTables to compare.py compare_CASA_tables
Update to add checking that tolerance is a list of len 2 when mode is both CAS-14415: Switch test_task_gencal.py EOP tests to new compTables mode CAS-14415: Support both relative and absolute tolerances in compTables