Gradle extension property outputFileNameFormat is not used

[DanielJette]

Describe the bug

Setting outputFileNameFormat does not impact the file name being used.

This issue relates to:

• [x] The Kotlin library
• [x] The Gradle plugin
• [ ] The IntelliJ Platform plugin
• [ ] The sample code
• [ ] The documentation

To Reproduce

testify {
    outputFileNameFormat = "n"
}

Expected behavior

Test files should be named default.png, but are still named className_default.png

Version

2.0.0