LU-10662 llite: Add exit for filedata allocation failed

LU-10662 llite: Add exit for filedata allocation failed

When the filedata allocation fails, we need to exit to
a later point than out_openerr, which calls
deauthorize_statahead and ll_file_data_put, neither of
which is valid. (This leads to a panic.)

Signed-off-by: Ben Evans <bevans@cray.com>
Change-Id: I670d578f01b2731761e3149db36dd8da1551a30a
Cray-bug-id: LUS-1321
Reviewed-on: https://review.whamcloud.com/31296
Reviewed-by: Patrick Farrell <paf@cray.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Alexandr Boyko <c17825@cray.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>