Test value wrapper for Provider<RegularFile> should not be based on buildDir

[Larusso]

Description

When wrapping string path values to type Provider<RegularFile> the absolute path will be based on the buildDir not the project directory like the normal RegularFile wrapper would use.
This can lead to undesired testing behaviors.

gradle-commons-test/src/main/groovy/com/wooga/gradle/test/IntegrationSpec.groovy

Lines 97 to 105 in 50921d6

	case "RegularFile":
	value = "project.layout.projectDirectory.file(${wrapValueBasedOnType(rawValue, String, fallback)})"
	break
	case "Provider":
	switch (subType) {
	case "RegularFile":
	value = "project.layout.buildDirectory.file(${wrapValueBasedOnType(rawValue, String, fallback)})"
	break
	case "Directory":