rspec tests currently fail

```
  9) Puppet::Type::Datacat_collector simple merging source_key parameter should set an array when asked
     Failure/Error: @file.expects(:[]=).with(:source, [ 'one', 'two' ])
     
     NoMethodError:
       undefined method `expects' for #<Puppet::Type::File:0x0000555bb57e3360>
```
rspec tests currently fail. Just reporting since I bumped into it.