tests/twisted/tubes/test-si-tubes.py: Update the test to the new spec (no FUTURE properties), factorise the code.
tests/twisted/tubes/test-si-tubes.py: Update the test to the new spec (no FUTURE properties), factorise the code.

Ziemin/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,community-ssu/telepathy-gabble,community-ssu/telepathy-gabble,mlundblad/telepathy-gabble,Ziemin/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble,jku/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,community-ssu/telepathy-gabble,Ziemin/telepathy-gabble