Use LANG=C in example

[toolforger]

Incomplete fix: I don't know where to add the environment for the JSch example, and I haven't checked the code in the examples/ directory.

[coveralls]

Coverage decreased (-0.2%) to 91.944% when pulling 8941004 on toolforger:patch-1 into 5acbe1f on Alexey1Gavrilov:master.

[toolforger]

Test failure is unrelated to the change.

[agavrilov76]

Can you please elaborate why LANG=C is needed in the example code?

[toolforger]

LANG=C eliminates internationalization.
E.g. on my machine, ls does not respond with total XXX but with insgesamt XXX, making the script fail.