Fixes some typos in TestDomainReload
Fixes some typos in TestDomainReload

Addresses comments:
https://github.com/pythonnet/pythonnet/pull/958/#discussion_r390639971
https://github.com/pythonnet/pythonnet/pull/958/#discussion_r390640042
https://github.com/pythonnet/pythonnet/pull/958/#discussion_r390643563

AlexCatarino/pythonnet,pythonnet/pythonnet,QuantConnect/pythonnet,AlexCatarino/pythonnet,AlexCatarino/pythonnet,QuantConnect/pythonnet,pythonnet/pythonnet,pythonnet/pythonnet,AlexCatarino/pythonnet,QuantConnect/pythonnet