Cfy 1593 teardown from everywhere

in the scenario:
1) bootstrap --> manager 1
2) "cfy use <manager 2>"
3) "cfy teardown"
while the provider config will be of manager 2, manager 1 is the one which will actually get teared down because the local bootstrap files won't get overwritten.
i think its quite confusing

i'd suggest either raising an error (and basically only allowing to teardown a manager whose boostrap files you currently have or when there are no bootstrap files at all),
or tearing down the server that's currently being used without writing the bootstrap data into files, but rather pass them into the relevant teardown functions directly