maint: Fix sporadic sqlite error
ActiveRecord::StatementInvalid: SQLite3::IOException: disk I/O error
This happened if you ran these tests in the following order since Rails
wasn't disconnecting between tests.
rspec spec/unit/indirector/facts/inventory_active_record_spec.rb
spec/unit/indirector/node/active_record_spec.rb
Paired-with: Nick Lewis <nick@puppetlabs.com>