fixed puppet deprecation notices

warning: Deprecation notice:  Resource references should now be capitalized on line 10 in file /home/vagrant/wp-multisite-stack/classes/apache.pp
warning: Deprecation notice:  Resource references should now be capitalized on line 15 in file /home/vagrant/wp-multisite-stack/site.pp
warning: Deprecation notice:  Resource references should now be capitalized on line 25 in file /home/vagrant/wp-multisite-stack/site.pp
Add is root check on install.sh

So the user can't run install.sh if he isn't using sudo
or logged in as root