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When a file system is mounted read-only, setting the xattr value in
fix mode fails with an error code -EROFS.  The xattr should be fixed
after the file system is remounted read-write.  This patch verifies
that the set xattr succeeds, before setting the appraise status value
to INTEGRITY_PASS.
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>