Disable core-pattern setting in mmts test's docker entrypoint.

Author: kvap

tests2/docker-entrypoint.sh

@@ -6,7 +6,7 @@ if [ "${1:0:1}" = '-' ]; then
 	set -- postgres "$@"
 fi
 
-sudo sh -c 'echo "/pg/%p.%s.%c.%P.core" > /proc/sys/kernel/core_pattern'
+#echo "/pg/%p.%s.%c.%P.core" | sudo tee /proc/sys/kernel/core_pattern
 
 if [ "$1" = 'postgres' ]; then
 	mkdir -p "$PGDATA"