Do not include kotlin files to plugin

Author: olsh

gradle.properties

@@ -9,3 +9,6 @@ DotNetProjectName=ReSharper.Structured.Logging.Rider
 # We need to disable Gradle daemon after build otherwise the build hangs on build server
 # https://github.com/appveyor/ci/issues/1745
 org.gradle.daemon=false
+
+# We need it to avoid bundle Kotlin jars into plugin
+kotlin.stdlib.default.dependency=false