Wrap SITE name in quotes

Previously these were one word, but now it seems other forms
of writing the site name are introduced

"Allende, Chalcatongo" triggered this

modules/rhizo_base/templates/vars.sh.erb

@@ -6,7 +6,7 @@ function logc() {
     echo "[`date '+%d-%m-%Y %H:%M:%S'`] $txt" >> $LOGFILE
 }
 
-SITE=<%= @site_name %>
+SITE="<%= @site_name %>"
 
 <% @dids.each_with_index do |did, index| -%>
 DID[<%= index %>]=<%= did %>