vty: Check the result of the write command

When running on top of vboxsf the write option doesn't work and we
have a success that should be a failure. Check the success string
we want to see on write.

Change-Id: I460e2da10f049807e4729f53fc69448c9c30f5f9
1 file changed
tree: 5aba281d5a8de207897241701be0405f50c9465a
  1. osmopy/
  2. .gitignore
  3. README
  4. setup.py