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)


}
        String liquibaseHubApiKey = HubConfiguration.LIQUIBASE_HUB_API_KEY.getCurrentValue();
        if (liquibaseHubApiKey != null) {
            argsMap.put("liquibaseHubApiKey", liquibaseHubApiKey);
        }
        CommandScope liquibaseCommand = new CommandScope(commandName);
        for (Map.Entry<String, Object> entry : argsMap.entrySet()) {
            liquibaseCommand.addArgumentValue(entry.getKey(), entry.getValue());
        }
        return liquibaseCommand;
    }
    /**
     * Return the first "parameter" from the command line that does NOT have the form of parameter=value. A parameter
     * is a command line argument that follows the main action (e.g. update/rollback/...). Example:
     * For the main action "updateToTagSQL &lt;tag&gt;", &lt;tag&gt; would be the command argument.
     *
     * @return the command argument, if one is given. Otherwise null.
     */
    private String getCommandArgument() {
        for (String param : commandParams) {
            if (!param.contains("=")) {
                return param;
            }
        }
        return null;
    }
    /**
     * Returns the value for a command line parameter of the form parameterName=value, or defaultValue if that
     * parameter has not been specified by the user.
     *