multiple assertion errors in functional tests

Currently the functional tests are failing, this indicates either functionality is broken or tests are outdated. In either case this needs to be addressed.

examples:
E AssertionError: assert '#!/bin/sh\n#...riority 101\n' == '#!/bin/sh\n#... table main\n'
E #!/bin/sh
E # This file is managed by Juju.
E ip route flush cache
E - # Table: name main
E ? ^^
E + # Table: name mytable
E ? ++ ^^^...

...

E AssertionError: assert '#!/bin/sh\n#...riority 101\n' == '#!/bin/sh\n#...riority 101\n'
E #!/bin/sh
E # This file is managed by Juju.
E ip route flush cache
E # Table: name mytable
E - ip route replace default via 10.205.6.1 table mytable
E + ip route replace 1.1.2.0/24 dev ens3 table mytable
E - ip rule add from 10.205.6.0/24 to 1.1.1.1/32 priority 100...