LU-10818 obdecho: don't set ma_need in echo_attr_get_complex()

LU-10818 obdecho: don't set ma_need in echo_attr_get_complex()

echo_attr_get_complex() copies ma_need to a local variable, masks
MA_* values other than MA_INODE if MA_INODE is set in ma_need,
and restores the saved value of ma_need before the function exits.
This does not seem to be useful, and triggers an assertion in
echo_big_lmm_get() when MA_LOV and/or MA_LMV is set in ma_need.

Signed-off-by: Nikitas Angelinas <nangelinas@cray.com>
Cray-bug-id: LUS-6252
Reviewed-by: Patrick Farrell <paf@cray.com>
Reviewed-by: Andrew Perepechko <c17827@cray.com>
Change-Id: I3f5a01b57bdd83937f19fd1fa392b53f7b316455
Reviewed-on: https://review.whamcloud.com/33097
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Jenkins
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>