Bug 976112

95bb4e8 changed the directory structure such that `versions/0.6` is a symbolic link. If we attempt to migrate an existing v2 application, `cp -ad` over to `${OPENSHIFT_NODEJS_DIR}/versions` will fail, because it cannot replace a directory with symbolic link.

Here, we revert the directory in question to a real directory, and not share stuff among Node.js versions.