bug #3140: removed not defined variable

(cherry picked from commit 09d5aa1d77)

src/vmm_mad/remotes/ec2/ec2_driver.rb

@@ -404,10 +404,8 @@ private
             if all_ec2_elements.size == 1
                 ec2 = all_ec2_elements[0]
             else
-                STDERR.puts(
-                    "Cannot find EC2 element in deployment file "<<
-                    "#{local_dfile} or couldn't find any EC2 site matching "<<
-                    "one of the template.")
+                STDERR.puts("Cannot find EC2 element in deployment file or no" \
+                    "EC2 site matching in the template.")
                 exit(-1)
             end
         end