Added 'custom_osparams' to the rapi I_FIELDS.
Added 'custom_osparams' to the rapi I_FIELDS.

Signed-off-by: Zachary Newell <63ea93a8034d986e92e050c2734c3ebf92efbdd3@unr.edu>

ganeti/ganeti,ganeti/ganeti,ganeti/ganeti