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)


int returnCode = cli.execute(args);
        System.exit(returnCode);
    }
    private void cleanup() {
        if (fileHandler != null) {
            fileHandler.flush();
            fileHandler.close();
        }
    }
    public LiquibaseCommandLine() {
        this.legacyPositionalArguments = new HashMap<>();
        this.legacyPositionalArguments.put("calculatechecksum", CalculateChecksumCommandStep.CHANGESET_IDENTIFIER_ARG.getName());
        this.legacyPositionalArguments.put("changelogsynctotag", ChangelogSyncToTagCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("changelogsynctotagsql", ChangelogSyncToTagSqlCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("dbdoc", DbDocCommandStep.OUTPUT_DIRECTORY_ARG.getName());
        this.legacyPositionalArguments.put("futurerollbackcountsql", FutureRollbackCountSqlCommandStep.COUNT_ARG.getName());
        this.legacyPositionalArguments.put("futurerollbackfromtagsql", FutureRollbackFromTagSqlCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("tag", TagCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("tagExists", TagExistsCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("rollback", RollbackCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("rollbacksql", RollbackSqlCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("rollbacktodate", RollbackToDateCommandStep.DATE_ARG.getName());
        this.legacyPositionalArguments.put("rollbacktodatesql", RollbackToDateSqlCommandStep.DATE_ARG.getName());
        this.legacyPositionalArguments.put("rollbackcount", RollbackCountCommandStep.COUNT_ARG.getName());
        this.legacyPositionalArguments.put("rollbackcountsql", RollbackCountSqlCommandStep.COUNT_ARG.getName());
        this.legacyPositionalArguments.put("updatecount", UpdateCountCommandStep.COUNT_ARG.getName());
        this.legacyPositionalArguments.put("updatecountsql", UpdateCountSqlCommandStep.COUNT_ARG.getName());
        this.legacyPositionalArguments.put("updatetotag", UpdateToTagCommandStep.TAG_ARG.getName());
        this.legacyPositionalArguments.put("updatetotagsql", UpdateToTagSqlCommandStep.TAG_ARG.getName());
        this.legacyNoLongerGlobalArguments = Stream.of(