fix lint

Author: nilsver

resources/libraries/update_hosts_file.rb

@@ -65,9 +65,9 @@ def managerToIp(str)
 
       if str =~ dns_regex
         begin
-          return Resolv.getaddress(str).to_s
+          Resolv.getaddress(str).to_s
         rescue Resolv::ResolvError
-          return nil
+          return
         end
       end
     end