Fix host_update test case for losing essential parameter

test_update_host_with_non_admin_user() test case doesn't
set 'status' and 'maintenance_mode' parameters which must
be set at least one.
And the test should only check admin privilege as the test
name, but current test contains other negative factor also.
This patch removes the factor by adding the parameters.

Closes-Bug #1269254

Change-Id: Ib582513629ffa9bcdc8a723e1ec9c36fbdd78591
2 files changed