spacemanager: Remove file count from space reservation list

The file count is way too expensive to retrieve.

Target: trunk
Require-notes: no
Require-book: yes
spacemanager: Fix unlock of allocated files on delete

The code made the wrong assumption that having a pnfs id bound
to the record implies that it cannot be in ALLOCATED. Since assumption
is wrong.

Target: trunk
Require-notes: no
Require-book: no
[maven-release-plugin] prepare release 2.8.0-rc7+ndgf
[maven-release-plugin] prepare for next development iteration