[copr][backend] copr-be.conf: higher threshold for consecutive failure check.

roles/copr/backend/templates/copr-be.conf.j2

@@ -47,13 +47,6 @@ group1_max_vm_total=4
 #group0_max_workers=4
 
 
-# soon this will be obsoleted
-terminate_vars=vm_name
-
-# directory where jobs are stored
-# no defaults
-jobsdir=/var/lib/copr/jobs
-
 # directory where results are stored
 # should be accessible from web using 'results_baseurl' URL
 # no default
@@ -62,7 +55,6 @@ destdir=/var/lib/copr/public_html/results
 # default is 10
 sleeptime=30
 
-
 # path to log file
 # default is /var/log/copr/backend.log
 logfile=/var/log/copr/backend.log
@@ -89,11 +81,8 @@ keygen_host={{ keygen_host }}
 # minimum age for builds to be pruned
 prune_days=14
 
-# Spawn builder in advance, before we get task?
-# It save time, but consume resources even when
-# nothing is in queue
-
-spawn_in_advance={{ spawn_in_advance }}
+# utilized by /usr/bin/check_consecutive_build_fails.py
+consecutive_failure_threshold=30
 
 [builder]
 # default is 1800