If the machine coordinating the test runs does not have jq, then test #175 fails with:
> test #1 "weave_on test-0.lon1.weave-net report | jq -r '.Router.Targets[] | tostring' | sort" failed:
> expected "test-1.lon1.weave-net
> test-2.lon1.weave-net"
> got nothing
This change completely removes the dependency on jq to make the test more robust and avoid potential confusion.