Make sure ethernet interface is DOWN before renaming and changing MAC #16833

Job	Run time
check_md_wf_files	0s
test_suite_tag	0s
test_suite_master / Determine best available runner	1s
get_run_id	0s
test_suite_pr	0s
test_suite_master / LPS LOC test suite	48m 8s
test_suite_master / EVE upgrade test suite (ext4)	42m 42s
test_suite_master / Networking test suite	1h 2m 20s
test_suite_master / EVE upgrade test suite (zfs)	58m 16s
test_suite_master / Smoke tests (ext4, true)	38m 16s
test_suite_master / Smoke tests (ext4, false)	36m 7s
test_suite_master / Smoke tests (zfs, true)	46m 29s
test_suite_master / Storage test suite (ext4)	28m 10s
test_suite_master / Smoke tests (zfs, false)	41m 2s
test_suite_master / User apps test suite	32m 15s
test_suite_master / Storage test suite (zfs)	34m 13s
test_suite_master / Virtualization test suite	26m 56s
	8h 14m 55s

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