umountfs shoud not use lsb init functions

[Fabio Massimo Di Nitto]

as in subject, umountfs will umount /usr (when /usr is on its own partition) and
a lot of error as spawned on the console due to missing tput. Please either
remove the use of lsb init in umount or check if tput is available before
invoking it.

[Nathaniel McCallum (nmccallum)]

lsb_1.3-9ubuntu5 checks for tput at each function call. Thus, tput features
will only be enabled if tput exists.

[Nathaniel McCallum (nmccallum)]

Tested this on a seperate /usr partition system, works. Closing.