* ansible-test - Add shell --export option.
* ansible-test - Support cmd args for shell command.
Also allow shell to be used without a valid layout if no delegation is required.
* ansible-test - Improve stderr/stdout consistency.
By default all output goes to stdout only, with the exception of a fatal error.
When using any of the following, all output defaults to stderr instead:
* sanity with the `--lint` option -- sanity messages to stdout
* coverage analyze -- output to stdout if the output file is `/dev/stdout`
* shell -- shell output to stdout
This fixes issues two main issues:
* Unpredictable output order when using both info and error/warning messages.
* Mixing of lint/command/shell output with bootstrapping messages on stdout.
* ansible-test - Add changelog fragment.
fe349a1ccd