vdsm.spec: Add python-inotify as buildrequires dep

This is needed because now the configure step checks for the
packages necessary for running vdsm.

Change-Id: I845c19fb2058d2f6036ce546f77f7b8ef28884a2
Signed-off-by: Antoni S. Puimedon <asegurap@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/21348
Reviewed-by: Dan Kenigsberg <danken@redhat.com>
Tested-by: Dan Kenigsberg <danken@redhat.com>