Added check on inep file when generating the run minute to cron

If the inep file is missing, we calculate the cron run minute based on a
random number. This will allow the agent.sh to run correctly even when
there's no inep stored on the system.

Signed-off-by: Vinicius Ruoso <vkr07@c3sl.ufpr.br>
Acked-by: Diego Pasqualin <dgp06@c3sl.ufpr.br>
Acked-by: Erik Alexandre Pucci <eap08@c3sl.ufpr.br>
Acked-by: Ricardo T Oliveira <rto07@c3sl.ufpr.br>
Signed-off-by: Josiney de Souza <josineys@c3sl.ufpr.br>

agent.sh

@@ -76,7 +76,11 @@ function checkUpdate()
 
 function schedule()
 {
-    MIN=$(( $(sed "s/[^0-9]//g" ${CLIENTCONFDIR}/inep) % 60 ))
+    if test -f "${CLIENTCONFDIR}/inep"; then
+        MIN=$(( $(sed "s/[^0-9]//g" ${CLIENTCONFDIR}/inep) % 60 ))
+    else
+        MIN=$(( $RANDOM % 60 ))
+    fi
 
     userCron="$(printf\
         "${MIN} ${SCHEDULE}\n${NETSCHEDULE}\n@reboot ${PREFIX}/agent.sh\n")"