Convert some of the testing Hash objects to use new-style hashes.
Convert some of the testing Hash objects to use new-style hashes.

laramiel/fluent-plugin-google-cloud,GoogleCloudPlatform/fluent-plugin-google-cloud,senthilkumar-kj/fluent-plugin-google-cloud,arthurdarcet/fluent-plugin-google-cloud,a-robinson/fluent-plugin-google-cloud,cosmo0920/fluent-plugin-google-cloud