tests: remove requirement to have an info.yaml for testing against mininon-sim
tests: remove requirement to have an info.yaml for testing against mininon-sim

Problem: nosetest tests/ fails when testing with minion-sim because
the config file mentions a path to info.yaml that is only created
when using teuthology to create a cluster.

Fix: stop trying to load it since the minion-sim based tests don't need
anything from info.yaml

Signed-off-by: Gregory Meno <4c6f7d69a238d85f14b1affaec7960ea26aa1c6d@redhat.com>
(cherry picked from commit c4dbf1558c30e532c2194d1b576cfad5503dd0b8)

r0h4n/ceph-integration