a7e76475ef
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. RBD Plugin: Fix bug in checking command not found error. **What this PR does / why we need it**: Fix bug in error checking logic. `Error()` method of command not found error returned from `command.Run/Output` is not "executable file not found in $PATH". Actually, it's `exec: "<command>": executable file not found in $PATH`. I followed the logic in https://github.com/kubernetes/kubernetes/blob/v1.9.0-alpha.1/pkg/kubectl/cmd/util/editor/editor.go#L129 to detect command not found error. **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # **Special notes for your reviewer**: https://play.golang.org/p/yZJxtouUQL **Release note**: ```release-note NONE ```