rcbops/chef-cookbooks#751: fixed issue when path attribute was changed

- when attribute node['collectd']['collectd_web']['path'] was changed
  between two Chef runs, the tarball wasn't extracted into the new path

(cherry picked from commit dccf5300ff516abbef05772d32b99cffd51d41f2)
Merge pull request #35 from claco/fix-path-action

Merged automatically by jenkins after successful build test