Add back steps which are needed to setup() and teardown().
Add back steps which are needed to setup() and teardown().

We need this to be called before every test function run to ensure a
consistent test environment.

In this scenario it's possible that some test run but others are skipped
so we can't rely on setup running as part of the first test case.

StackStorm/st2tests,StackStorm/st2tests,StackStorm/st2tests