Rewrite MultiplatformProjectImportingTest to use testData directory

idea/testData/gradle/multiplatform/multiProject/build.gradle

@@ -0,0 +1,56 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.1.0")
+    }
+}
+
+project('common-lib') {
+    apply plugin: 'kotlin-platform-common'
+}
+
+project('jvm-lib') {
+    apply plugin: 'kotlin-platform-jvm'
+
+    dependencies {
+        implement project(':common-lib')
+    }
+}
+
+project('js-lib') {
+    apply plugin: 'kotlin-platform-js'
+
+    dependencies {
+        implement project(':common-lib')
+    }
+}
+
+project('common-app') {
+    apply plugin: 'kotlin-platform-common'
+
+    dependencies {
+        compile project(':common-lib')
+    }
+}
+
+project('jvm-app') {
+    apply plugin: 'kotlin-platform-jvm'
+
+    dependencies {
+        implement project(':common-app')
+        compile project(':jvm-lib')
+    }
+}
+
+project('js-app') {
+    apply plugin: 'kotlin-platform-js'
+
+    dependencies {
+        implement project(':common-app')
+        compile project(':js-lib')
+    }
+}
+        

idea/testData/gradle/multiplatform/multiProject/settings.gradle

@@ -0,0 +1 @@
+include ':common-lib', ':jvm-lib', ':js-lib', ':common-app', ':jvm-app', ':js-app'