Allow to use folders for gradle configuration tests

idea/testData/configuration/gsk/pluginPresent/build_after.gradle.kts

@@ -0,0 +1,43 @@
+import org.gradle.api.JavaVersion.VERSION_1_7
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+val kotlin_version: String by extra
+buildscript {
+    var kotlin_version: String by extra
+    kotlin_version = "$VERSION$"
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath(kotlinModule("gradle-plugin", kotlin_version))
+    }
+}
+
+plugins {
+    application
+}
+
+apply {
+    plugin("kotlin")
+}
+
+application {
+    mainClassName = "samples.HelloWorld"
+}
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    testCompile("junit:junit:4.12")
+    compile(kotlinModule("stdlib-jre8", kotlin_version))
+}
+val compileKotlin: KotlinCompile by tasks
+compileKotlin.kotlinOptions {
+    jvmTarget = "1.8"
+}
+val compileTestKotlin: KotlinCompile by tasks
+compileTestKotlin.kotlinOptions {
+    jvmTarget = "1.8"
+}

idea/testData/configuration/gsk/pluginPresent/build_before.gradle.kts

@@ -0,0 +1,21 @@
+import org.gradle.api.JavaVersion.VERSION_1_7
+
+plugins {
+    application
+}
+
+apply {
+    plugin("kotlin")
+}
+
+application {
+    mainClassName = "samples.HelloWorld"
+}
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    testCompile("junit:junit:4.12")
+}