Make sure /var/vcap/store/grafana exists

Signed-off-by: Jamie Van Dyke <jamie.vandyke@digital.cabinet-office.gov.uk>

Author: dark5un

jobs/grafana/templates/bin/pre-start

@@ -7,6 +7,7 @@ mkdir -p /usr/share/fonts/freefont
 cp -a /var/vcap/packages/grafana/freefont/* /usr/share/fonts/freefont
 
 # grafana is ran with bpm as user vcap
+mkdir -p /var/vcap/store/grafana
 chown vcap:vcap -R /var/vcap/store/grafana
 
 echo "[$(date)] Calling 'prometheus-dashboards' ..."