Fix parse error when not using new command box

After turning off the new command box and trying to render a service the
following error was presented in the Thruk log:

Couldn't render template "extinfo_type_2.tt: file error - parse error -
_service_command_box_full.tt line 60: unexpected token (ELSE)
Merge pull request #414 from awiddersheim/fix_full_service_command_box

Fix parse error when not using new command box