Clean up tests.
Merge remote-tracking branch 'upstream/master'
remove `JsonProviderFactory`, the `JsonProvider` should be set via `Configuration`
replace usage of JsonProviderFactory in other modules
Merge pull request #48 from jochenberger/remove-json-provider-factory

remove `JsonProviderFactory`, the `JsonProvider` should be set via `Configuration`
Merge remote-tracking branch 'upstream/master'