Make projectTests type of dependency transitive on testRuntime dependencies

`tests-jar` configuration now extends testRuntime instead of testCompile
(note that testRuntime extends testCompile),
and projectTests() dependency shortcut makes it transitive.

This is required to depend on test utility modules producing `-tests` jar instead of default one
without listing all their transitive dependencies.

compiler/tests-java8/build.gradle.kts

@@ -20,7 +20,6 @@ dependencies {
     testCompile(projectDist(":kotlin-reflect"))
     testCompile(projectTests(":compiler"))
     testCompile(projectTests(":compiler:tests-common"))
-    testCompile(projectTests(":compiler:tests-common-jvm6"))
     testRuntime(projectRuntimeJar(":kotlin-preloader"))
     testRuntime(preloadedDeps("dx", subdir = "android-5.0/lib"))
     testRuntime(ideaSdkCoreDeps("*.jar"))