Fix bug with panic when DOCKER_CLI_EXPERIMENTAL environment variable is incorrect
Fix bug with panic when DOCKER_CLI_EXPERIMENTAL environment variable is incorrect

Signed-off-by: Daniil Nikolenko <63767fd1abd74533db4c193070391e0f3e93a806@gmail.com>

cpuguy83/cli,cpuguy83/cli,docker/cli,thaJeztah/cli,docker/cli,thaJeztah/cli