Fix new LALSimulation tests for out of tree builds

This fixes TestAllApproximants and LALSimWaveformReference.py to work for
out of tree builds, including when running make distcheck.
The name of the reference file used by LALSimWaveformReference.py was also
changed so it is not deleted when running make clean
disable waveform tests for the time being
redoing glitch amplitude prior

by-hand merge with master

resolving conflict with marginalized likelihood
small fix to check for adaptation in glitch proposal