art: Drop provider from c3os code

Part of: https://github.com/c3os-io/c3os/issues/68

sdk/bus/hooks.go

@@ -0,0 +1,18 @@
+package bus
+
+import (
+	"os"
+	"os/exec"
+)
+
+func RunHookScript(s string) error {
+	_, err := os.Stat(s)
+	if err != nil {
+		return nil
+	}
+	cmd := exec.Command(s)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Stdin = os.Stdin
+	return cmd.Run()
+}