Revert "laldetchar: remove unneeded check for LALSimulation"

This reverts commit 5f48f4109378d43fb346cdf781025108ccf878ac.
SWIG: fix minor bug in installation of Python modules

- wrong glob was used to remove old installed modules
XLALMarcumQ.c:  remove unused variable
XLALMarcumQ:  display full arguments to full precision in range errors
LALMarcumQTest.py:  check that lal module is correct one