Use KotlinCoreEnvironment for parsing Kotlin in IC

Creating and disposing CoreApplicationEnvironment on each call leads to
problems with parallel builds, while KotlinCoreEnvironment
avoids disposing application environment in case of parallel builds.

    #KT-23694 fixed

jps-plugin/src/org/jetbrains/kotlin/compilerRunner/CompilerRunnerUtil.kt

@@ -104,7 +104,7 @@ object CompilerRunnerUtil {
         environment: JpsCompilerEnvironment,
         files: Set<File>
     ): Set<String> = withCompilerClassloader(environment) { classLoader ->
-        val klass = Class.forName("org.jetbrains.kotlin.parsing.util.ParseFileUtilsKt", true, classLoader)
+        val klass = Class.forName("org.jetbrains.kotlin.incremental.parsing.ParseFileUtilsKt", true, classLoader)
         val method = klass.getMethod("classesFqNames", Set::class.java)
         @Suppress("UNCHECKED_CAST")
         method.invoke(klass, files) as? Set<String>