Add to Ceph storage helper 3 options to define striping parameters. Striping parameters for Ceph are documented here: http://docs.ceph.com/docs/giant/dev/file-striping/

Currently hard-coded values are provided directy in the code: https://git.plgrid.pl/projects/VFS/repos/helpers/browse/src/cephHelper.cc#545-548

The update must be included in the swagger-onepanel definition: https://git.plgrid.pl/projects/VFS/repos/onepanel-swagger/browse/definitions/storage_ceph.yaml?at=refs%2Fheads%2Fdevelop

and in bamboos Ceph docker setup: https://git.plgrid.pl/projects/VFS/repos/bamboos/browse/docker/environment/create_ceph_storage.escript

and then merged into Onepanel and Oneprovider components.