LU-7988 hsm: change the cdt event flags to a simple boolean

LU-7988 hsm: change the cdt event flags to a simple boolean

Change the coordinator flag into a boolean event since only one bit is
now used. Do not include lustre_net.h as it's not necessary anymore.

Test-Parameters: trivial testlist=sanity-hsm
Signed-off-by: frank zago <fzago@cray.com>
Change-Id: I15dc10125af97f6244c98b421a262f320b79158b
Reviewed-on: https://review.whamcloud.com/22789
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: Quentin Bouget <quentin.bouget@cea.fr>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Ben Evans <bevans@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>