squash plugin:  Fix setup_method in squash test
squash plugin:  Fix setup_method in squash test

The squash test was failing for me locally because of a missing
parameter, 'method'. Upstream docs seems to imply this is needed.

Adding in the unused parameter allows the test to work for me again.

projectatomic/atomic-reactor,vrutkovs/atomic-reactor,fr34k8/atomic-reactor,projectatomic/atomic-reactor,DBuildService/atomic-reactor,jarodwilson/atomic-reactor,maxamillion/atomic-reactor,DBuildService/atomic-reactor,jarodwilson/atomic-reactor,fr34k8/atomic-reactor,maxamillion/atomic-reactor,vrutkovs/atomic-reactor