* (WIP) nxos_l3_interfaces: fix states, add new minor attributes
* sa cleanup
* more regression fixes
* test_8 for add'l code coverage
* Fix regressions to handle mgmt w/o IP
* add 'no system default switchport' to regression setups
* add err msg to terminal_stderr_re so that cli_config will catch L2 failures
* regression test change: /int4/int3/
* Add default rsvd_intf_len for Zuul CI
* Fix replaced-with-no-ipaddr and ip redirect issues
