[MASSEMBLY-852] - directoryMode permissions are lost if include is present

[michaelboyles]

https://issues.apache.org/jira/browse/MASSEMBLY-852

The problem is essentially that ZipArchiver has 2 ways of setting directory mode ("override" and "default"), and we were only setting one of them. It is very unintuitive, but basically one is used when creating a directory outright (when a pattern matches it), and the other is used when creating the parent directories required by a matched file.

In the reporters case, the * ant pattern does not match the root directory so only the file is matched and the latter path is followed. There is a workaround to use a regex, which I posted on the ticket.

The safest thing for us to do is to set both the directory modes. We don't want to make a distinction between the two types.

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