Fix test

Signed-off-by: David Gageot <david@gageot.net>

test/integration/core/inspect_format.bats

@@ -23,7 +23,7 @@ fi
 
 @test "$DRIVER: check .Driver output is not flawed" {
   only_if_env DRIVER virtualbox
-  run docker-machine inspect -f '{{.Driver.SSHUser}}' $NAME
+  run machine inspect -f '{{.Driver.SSHUser}}' $NAME
   [ "$status" -eq 0 ]
   [[ ${output} == "docker" ]]
 }