LU-11161 tests: stop running sanity test 160g

LU-11161 tests: stop running sanity test 160g

When run with two or more MDSs, sanity test 160g will fail
due to expecting a changelog user being deregistered on
all MDSs.

In order to stop sanity 160g from failing, add it to the
ALWAYS_EXCEPT list when running in a DNE environment which
results in the test not being executed.

Test-Parameters: trivial
Test-Parameters: testlist=sanity mdtcount=2 mdscount=2
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: I091f148a3da820cad0103aead559a96c54c9fe8b
Reviewed-on: https://review.whamcloud.com/32844
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>