Fix for cron.service: Start request repeated too quickly. (#725)

* Update cron-schedule.sh

restarts to often

* Create cron-restart.sh

only need to restart once.

* Update homestead.rb

restart cron daemon once to prevent 
homestead systemd[1]: cron.service: Start request repeated too quickly.

https://laracasts.com/discuss/channels/servers/homestead-create-schedule-fails

scripts/cron-restart.sh

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+service cron restart

scripts/cron-schedule.sh

@@ -10,5 +10,3 @@ SITE_PUBLIC_DIRECTORY=$2
 cron="* * * * * vagrant /usr/bin/php $SITE_PUBLIC_DIRECTORY/../artisan schedule:run >> /dev/null 2>&1"
 
 echo "$cron" > "/etc/cron.d/$SITE_DOMAIN"
-
-service cron restart

scripts/homestead.rb

@@ -184,6 +184,7 @@ def Homestead.configure(config, settings)
         end
 
         if settings.include? 'sites'
+            has_cron = false
             settings["sites"].each do |site|
 
                 # Create SSL certificate
@@ -220,6 +221,7 @@ def Homestead.configure(config, settings)
                         if (site["schedule"])
                             s.path = scriptDir + "/cron-schedule.sh"
                             s.args = [site["map"].tr('^A-Za-z0-9', ''), site["to"]]
+                            has_cron = true
                         else
                             s.inline = "rm -f /etc/cron.d/$1"
                             s.args = [site["map"].tr('^A-Za-z0-9', '')]
@@ -233,6 +235,11 @@ def Homestead.configure(config, settings)
                     end
                 end
             end
+            # Restart cron daemon
+            if has_cron
+                config.vm.provision "shell" do |s|
+                s.path = scriptDir + "/cron-restart.sh"
+            end
         end
 
         config.vm.provision "shell" do |s|