mom6-pipeline-run time limit to 50 minutes

The MOM6 pipeline is currently timing out due to issues related to the
scheduler, so this patch temporarily increases the limit from 42 to 50
minutes.

The overall timing of these jobs will be recalibrated after the
scheduler has been fixed.

tools/MRS/Makefile

@@ -49,7 +49,7 @@ mom6-pipeline-run:
 	time make -f tools/MRS/Makefile.clone .datasets
 	@echo -e "\e[0Ksection_end:`date +%s`:uncache\r\e[0K"
 	(echo '#!/bin/tcsh';echo 'time make -f tools/MRS/Makefile mom6-pipeline-run-steps') > job.sh
-	sbatch --clusters=c3,c4 --nodes=30 --time=0:42:00 --account=gfdl_o --qos=debug --job-name=mom6_examples_tests --output=log.$$CI_PIPELINE_ID --wait job.sh && ( egrep -v '.*: *$$|pagefaults|HiWaterMark=' log.$$CI_PIPELINE_ID ; echo Job returned normally ) || ( cat log.$$CI_PIPELINE_ID ; echo Job failed ; exit 911 )
+	sbatch --clusters=c3,c4 --nodes=30 --time=0:50:00 --account=gfdl_o --qos=debug --job-name=mom6_examples_tests --output=log.$$CI_PIPELINE_ID --wait job.sh && ( egrep -v '.*: *$$|pagefaults|HiWaterMark=' log.$$CI_PIPELINE_ID ; echo Job returned normally ) || ( cat log.$$CI_PIPELINE_ID ; echo Job failed ; exit 911 )
 	test -f results.ignore/restart_stats_gnu.tar.gz || ( echo Batch job did not complete ; exit 911 )
 	@echo -e "\e[0Ksection_start:`date +%s`:cache[collapsed=true]\r\e[0KCaching results"
 	time tar zvcf $(CACHE_DIR)/results-$(CI_PIPELINE_ID).tgz results.*