gstlal_ll_inspiral_pastro_uploader: change default for model update cadence back to four hours

gstlal-inspiral/bin/gstlal_ll_inspiral_pastro_uploader

@@ -58,7 +58,7 @@ def parse_command_line():
 	parser.add_option("--pastro-filename", metavar = "string", default = "p_astro.json", help = "Name to upload the p(astro) file with. Default is p_astro.json.")
 	parser.add_option("--model-name", metavar = "string", help = "Name of pastro model used, eg FGMC.")
 	parser.add_option("--pastro-model-file", metavar = "file", help = "Filename of pastro model.")
-	parser.add_option("--update-model-cadence", metavar = "seconds", type = "float", default = float("inf"), help = "Cadence on which to update the model file with latest ranking statistic information. Default is inf so that the model will only be updated upon start up.")
+	parser.add_option("--update-model-cadence", metavar = "seconds", type = "float", default = 4. * 3600., help = "Cadence on which to update the model file with latest ranking statistic information. Default is four hours.")
 	parser.add_option("--rank-stat", metavar = "file", help = "Filename of ranking stat pdf to update the pastro model with.")
 
 	options, args = parser.parse_args()