team: add team_port_multiple_slaves
cover team-port connection property
part of the test is commented out, until bug get fixed: https://bugzilla.redhat.com/show_bug.cgi?id=1755406
add steps for simple JSON check
cover team-port connection property
part of the test is commented out, until bug get fixed: https://bugzilla.redhat.com/show_bug.cgi?id=1755406
add steps for simple JSON check