We have a liquibase command that looks something like this:

```sh
/liquibase/liquibase \
       --driver=org.postgresql.Driver \
       --changeLogFile="db.changelog-master.xml" \
       --url=<redacted> \
       --username=<redacted> \
       --password=<redacted> \
       update \
       -Dcoreschema="${core_schema}"
```

After upgrading the CLI from 4.3.3 to 4.4.0, it fails with the following error:

```
Unexpected argument(s): -Dcoreschema=public

For detailed help, try 'liquibase --help' or 'liquibase <command-name> --help'
```

Since the release notes state "this release should be 100% backwards compatible", I expect this is an oversight? Or is there a replacement for the `-Dproperty=value` syntax? I haven't found one looking through `--help` and the [property substitution docs](https://docs.liquibase.com/concepts/basic/changelog-property-substitution.html) at least.

The syntax can also still be found on https://docs.liquibase.com/tools-integrations/cli/home.html:

![image](https://user-images.githubusercontent.com/2620907/122090597-36d63400-ce08-11eb-92e8-d320cd5c5baa.png)


}
        return returnList;
    }
    private CommandLine.Model.CommandSpec getParentCommandSpec(CommandDefinition commandDefinition, CommandLine rootCommand) {
        final String[] commandName = commandDefinition.getName();
        CommandLine.Model.CommandSpec parent = rootCommand.getCommandSpec();
        
        for (int i = 0; i < commandName.length - 1; i++) {
            final CommandLine commandGroup = parent.subcommands().get(commandName[i]);
            final String[] groupName = Arrays.copyOfRange(commandName, 0, i + 1);
            if (commandGroup == null) {
                parent = addSubcommandGroup(groupName, commandDefinition, parent);
            } else {
                parent = commandGroup.getCommandSpec();
            }
            configureSubcommandGroup(parent, groupName, commandDefinition);
        }
        return parent;
    }
    private void configureSubcommandGroup(CommandLine.Model.CommandSpec groupSpec, String[] groupName, CommandDefinition commandDefinition) {
        final String header = StringUtil.trimToEmpty(commandDefinition.getGroupShortDescription(groupName));
        final String description = StringUtil.trimToEmpty(commandDefinition.getGroupLongDescription(groupName));
        if (!header.equals("")) {
            groupSpec.usageMessage().header("< " + header + " >\n");
        }
        if (!description.equals("")) {
            groupSpec.usageMessage().description(description + "\n");
        }
    }
    private CommandLine.Model.CommandSpec addSubcommandGroup(String[] groupName, CommandDefinition commandDefinition, CommandLine.Model.CommandSpec parent) {