fix directory empty options if an empty array is being used

[bovy89]

puppetlabs-apache 6.5.1 with options => false

  <Directory "/var/www/html/myapp">
    AllowOverride None
    Require all granted
  </Directory>

puppetlabs-apache latest with options => []

   <Directory "/var/www/html/myapp">
     Options
     AllowOverride None
     Require all granted
   </Directory>

[CLAassistant]

All committers have signed the CLA.

[ekohl]

Tests are still running

[david22swan]

LGTM