Merge branch 'prolog' into 'master'

Dropping cache on epilog & prolog

See merge request !130

Former-commit-id: 7f2582b8

roles/slurm-common/templates/slurm.epilog.j2

 #!/bin/sh
+
 # specific files to be deleted to clean up after a Strudel session
 find /tmp -user ${SLURM_JOB_USER} -name "pulse*" | xargs rm -rf
 find /tmp -user ${SLURM_JOB_USER} -name ".esd-*" | xargs rm -rf
 find /tmp -user ${SLURM_JOB_USER} -name ".X*-lock" | xargs rm -rf
 find /tmp/.X11-unix -user ${SLURM_JOB_USER} -name "X*" | xargs rm -rf
+
+
+# echo 1 to drop page cache
+/bin/sync
+/bin/echo 1 > /proc/sys/vm/drop_caches
+
+exit 0

roles/slurm-common/templates/slurm.prolog.j2

 #!/bin/sh
+
+# echo 1 to drop page cache
+/bin/sync
+/bin/echo 1 > /proc/sys/vm/drop_caches
+
 exit 0