qa: ignore skip errors for kclient

qa: ignore skip errors for kclient

To avoid this failure:

	2020-11-01T07:21:35.117 INFO:tasks.cephfs_test_runner:test_volume_without_namespace_isolation (tasks.cephfs.test_volume_client.TestVolumeClient) ... ok
	2020-11-01T07:21:35.118 INFO:tasks.cephfs_test_runner:
	2020-11-01T07:21:35.118 INFO:tasks.cephfs_test_runner:======================================================================
	2020-11-01T07:21:35.119 INFO:tasks.cephfs_test_runner:FAIL: test_evict_client (tasks.cephfs.test_volume_client.TestVolumeClient)
	2020-11-01T07:21:35.119 INFO:tasks.cephfs_test_runner:----------------------------------------------------------------------
	2020-11-01T07:21:35.119 INFO:tasks.cephfs_test_runner:Requires FUSE client to inject client metadata
	2020-11-01T07:21:35.119 INFO:tasks.cephfs_test_runner:----------------------------------------------------------------------
	2020-11-01T07:21:35.119 INFO:tasks.cephfs_test_runner:Ran 18 tests in 732.749s
	2020-11-01T07:21:35.120 INFO:tasks.cephfs_test_runner:
	2020-11-01T07:21:35.120 INFO:tasks.cephfs_test_runner:FAILED (failures=1)

Fixes: https://tracker.ceph.com/issues/23718
Signed-off-by: Patrick Donnelly <pdonnell@redhat.com>