MODE-1880 FileSystemConnector uses incorrect ID when adding content to nt:file nodes

[codebrewer]

The local name was being used to prevent generation of filenames containing the : character, but this is unnecessary for jcr:content nodes since the content should end up on disk in the file associated with the nt:file ancestor node.

[rhauch]

For future reference, be sure to do your work on a branch so that your changes are isolated, and then push your branch to your fork and create the pull-request. We sometimes need to modify the commits (usually because we need to rebase them on top of commits merged since you created your pull-request). If your master contains your commits and you fetched our (slightly-different) commits, your master branch can be different than ours.

Luckily, we can use these commits as-is, so this pull-request is fine.