gstlal-inspiral: fix column names in output document

- sngl_inspiral's process column is "process:process_id"

gstlal-inspiral/python/inspiral.py

@@ -252,7 +252,7 @@ def chisq_distribution(df, non_centralities, size):
 
 
 class CoincsDocument(object):
-	sngl_inspiral_columns = ("process_id", "ifo", "end_time", "end_time_ns", "eff_distance", "coa_phase", "mass1", "mass2", "snr", "chisq", "chisq_dof", "bank_chisq", "bank_chisq_dof", "sigmasq", "spin1x", "spin1y", "spin1z", "spin2x", "spin2y", "spin2z", "template_duration", "event_id", "Gamma0", "Gamma1")
+	sngl_inspiral_columns = ("process:process_id", "ifo", "end_time", "end_time_ns", "eff_distance", "coa_phase", "mass1", "mass2", "snr", "chisq", "chisq_dof", "bank_chisq", "bank_chisq_dof", "sigmasq", "spin1x", "spin1y", "spin1z", "spin2x", "spin2y", "spin2z", "template_duration", "event_id", "Gamma0", "Gamma1")
 
 	def __init__(self, url, process_params, comment, instruments, seg, offsetvectors, injection_filename = None, tmp_path = None, replace_file = None, verbose = False):
 		#