gstlal-inspiral: add O2 hyperbank mass model

- switch ranking statistic to this unconditionally for the October 2018
  open public alert test run.  after the test run and before O3 we will
  introduce more user-friendly plumbing allowing this to work with other
  template banks.
- NOTE:  git-lfs is used for any file ending in .hdf5 in the
  population_models/ tree

gstlal-inspiral/python/stats/inspiral_intrinsics.py

@@ -72,6 +72,10 @@ __all__ = [
 
 
 class UniformInTemplatePopulationModel(object):
+	# FIXME:  this needs to learn the template chirp masses so it can
+	# take out the factor of mchirp**(5./3.) factor on which the
+	# horizon distance depends (which appears in a volume factor in the
+	# numerator of the likelihood ratio)
 	def __init__(self, template_ids):
 		"""
 		Assumes uniform in template population model, no
@@ -87,7 +91,8 @@ class UniformInTemplatePopulationModel(object):
 
 
 class SourcePopulationModel(object):
-	DEFAULT_FILENAME = os.path.join(gstlal_config_paths["pkgdatadir"], "lnP_template_signal_BNS_gaussian_lowspin_Ozel.hdf5")
+	POPULATION_MODELS_PATH = os.path.join(gstlal_config_paths["pkgdatadir"], "population_models")
+	DEFAULT_FILENAME = os.path.join(POPULATION_MODELS_PATH, "O2/lnP_template_signal_BBH_logm_reweighted_mchirp.hdf5")
 
 
 	def __init__(self, template_ids, filename = None):

gstlal-inspiral/python/stats/inspiral_lr.py

@@ -261,14 +261,8 @@ class LnSignalDensity(LnLRDensity):
 		self.horizon_history = horizonhistory.HorizonHistories((instrument, horizonhistory.NearestLeafTree()) for instrument in self.instruments)
 
 		# source population model
-		if self.template_ids:
-			self.population_model = inspiral_intrinsics.UniformInTemplatePopulationModel(self.template_ids)
-			# FIXME:  switch to this when a model file becomes
-			# available
-			#self.population_model = inspiral_intrinsics.SourcePopulationModel(self.template_ids)
-		else:
-			# default lnP = 1/len(templates) = 0
-			self.population_model = inspiral_intrinsics.UniformInTemplatePopulationModel([0])
+		# FIXME:  introduce a mechanism for selecting the file
+		self.population_model = inspiral_intrinsics.SourcePopulationModel(self.template_ids)
 
 		self.InspiralExtrinsics = inspiral_extrinsics.InspiralExtrinsics(self.min_instruments)
 

gstlal-inspiral/share/population_models/Makefile.am

 SUBDIRS = O2
+
+population_modelsdir = $(pkgdatadir)/$(subdir:share/%=%)

gstlal-inspiral/share/population_models/O2/Makefile.am

+population_modelsdir = $(pkgdatadir)/$(subdir:share/%=%)
+
+population_models_DATA = \
+	lnP_template_signal_BBH_logm_reweighted_mchirp.hdf5