Fix incorrect syntax in pillar example for SSLCertificateFile, SSLCertificateKeyFile

Fix check for SSLCertificateFile, SSLCertificateKeyFile variables in vhosts/standard.tmpl, now using dict.get()

apache/vhosts/standard.tmpl

     {% if site.get('DocumentRoot') != False %}DocumentRoot {{ vals.DocumentRoot }}{% endif %}
     {% if site.get('VirtualDocumentRoot') %}VirtualDocumentRoot {{ vals.VirtualDocumentRoot }}{% endif %}
 
-    {% if site.SSLCertificateFile is defined %}
+    {% if site.get('SSLCertificateFile') != False %}
     SSLEngine on
     SSLCertificateFile {{ site.SSLCertificateFile }}
-    {%   if site.SSLCertificateKeyFile is defined %}
+    {%   if site.get('SSLCertificateKeyFile') != False %}
     SSLCertificateKeyFile {{ site.SSLCertificateKeyFile }}
     {%   endif %}
     {% endif %}

pillar.example

 
       DocumentRoot: /path/to/www/dir/example.com # E.g., /var/www/example.com
 
-      SSLCertificateFile = /etc/ssl/mycert.pem # if ssl is desired
-      SSLCertificateKeyFile = /etc/ssl/mycert.pem.key # if key for cert is needed or in an extra file
+      SSLCertificateFile: /etc/ssl/mycert.pem # if ssl is desired
+      SSLCertificateKeyFile: /etc/ssl/mycert.pem.key # if key for cert is needed or in an extra file
 
       Directory:
         # "default" is a special case; Adds ``/path/to/www/dir/example.com``