In our beaker rspec testing we ssh into localhost pretending it is a
managed VM because that is how all the config management testing tools
want to work... This is has run into problems with new format ssh keys
which zuul provides. If such a key is present we convert it to PEM
othrewise we generate our own.
Also add ensure-virtualenv to the job as we appear to need it to run
these tests properly.
Change-Id: Ibb6080b5a321a6955866ef9b847c4d00da17f427
dff18bac1b