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 attributeName = splitArg[0];
            String value = splitArg[1];
            if (OPTIONS.REFERENCE_DRIVER.equalsIgnoreCase(attributeName)) {
                refDriver = value;
            } else if (OPTIONS.REFERENCE_URL.equalsIgnoreCase(attributeName)) {
                refUrl = value;
            } else if (OPTIONS.REFERENCE_USERNAME.equalsIgnoreCase(attributeName)) {
                refUsername = value;
            } else if (OPTIONS.REFERENCE_PASSWORD.equalsIgnoreCase(attributeName)) {
                refPassword = value;
            } else if (OPTIONS.REFERENCE_DEFAULT_CATALOG_NAME.equalsIgnoreCase(attributeName)) {
                defCatalogName = value;
            } else if (OPTIONS.REFERENCE_DEFAULT_SCHEMA_NAME.equalsIgnoreCase(attributeName)) {
                defSchemaName = value;
            } else if (OPTIONS.DATA_OUTPUT_DIRECTORY.equalsIgnoreCase(attributeName)) {
                dataOutputDirectory = value;
            }
        }
        if (refUrl == null) {
            throw new CommandLineParsingException(
                    String.format(coreBundle.getString("option.required"), "--referenceUrl"));
        }
        return CommandLineUtils.createDatabaseObject(resourceAccessor, refUrl, refUsername, refPassword, refDriver,
                defCatalogName, defSchemaName, Boolean.parseBoolean(outputDefaultCatalog), Boolean.parseBoolean
                        (outputDefaultSchema), null, null, this.propertyProviderClass, this.liquibaseCatalogName,
                this.liquibaseSchemaName, this.databaseChangeLogTableName, this.databaseChangeLogLockTableName);
    }
    private OutputStream getOutputStream() throws IOException {
        if (outputStream != null) {
            return outputStream;