Fix (properly) 'execute_command()' missing 'opts' parameter

Author: epinna

modules/exploits/unix/http/vmturbo_vmtadmin_exec_noauth.rb

@@ -99,7 +99,7 @@ def check
     end
   end
 
-  def execute_command(cmd, opts = {})
+  def execute_command(cmd, opts)
     begin
     res = send_request_cgi({
       'uri'    => '/cgi-bin/vmtadmin.cgi',
@@ -123,7 +123,7 @@ def exploit
     # Handle single command shot
     if target.name =~ /CMD/
       cmd = payload.encoded
-      res = execute_command(cmd)
+      res = execute_command(cmd, {})
 
       unless res
         fail_with(Failure::Unknown, "#{peer} - Unable to execute payload")