[CDASH] Try to fix CET/CEST in script finding job end time

Should fix the silently failing (hard killed by SLURM) weekly test on virgo2

scripts/find_slurm_ctest_stop_time.sh

@@ -20,7 +20,8 @@
 
 # SLURM end time
 END_TIME=`squeue -j ${SLURM_JOB_ID} -h --Format EndTime`
-echo "SLURM Job end time ${END_TIME}"
+CET_CEST=`date +"%Z"`
+echo "SLURM Job end time ${END_TIME} probably ${CET_CEST}"
 
 # Ctest end time = SLURM -5 minutes (should be enough for coverage and uploads)
 # => Not working as ctest expects the "time point in hours-minutes-seconds within current day"
@@ -36,7 +37,8 @@ echo "SLURM Job end time ${END_TIME}"
 #    (tried all timezone options of date, with and without space between time and timezone)
 #CTEST_END_TIME_LIMIT=`date -d "${END_TIME}CET -5minutes" +"%H:%M:%S %z"`
 # => Working! but probably unsafe on day of Summer time swaps + if tests run close to midnight...
-CTEST_END_TIME_LIMIT=`date -d "${END_TIME}CET -5minutes" +"%H:%M:%S"`
+# => Fixed for summer time but will probably still fail on the day of the swap itself... so twice a year
+CTEST_END_TIME_LIMIT=`date -d "${END_TIME}${CET_CEST} -5minutes" +"%H:%M:%S"`
 echo "Setting the job time limit for ctest to ${CTEST_END_TIME_LIMIT} to make sure CDASH data is uploaded"
 
 if [[ $# -eq 1 ]]; then