Instead of calling flush separatly for each IO class, it is called after
collecting number of dirty cache lines defined by user or after iterating
through all IO classes.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
Unlocking cache and putting queue are perormed in cleaning completion, so all
cleaning policies has to call completion.
Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
