Smart completion: inheritors instantiation suggested + fixed a bug with incorrect presentation of generic java class instantiation

idea/testData/completion/smartMultiFile/GenericInheritors4/GenericInheritors4.kt

@@ -0,0 +1,8 @@
+import p.*
+
+fun foo(): KotlinTrait<I1<I2>> {
+    return <caret>
+}
+
+// EXIST: { lookupString: "object", itemText: "object: KotlinTrait<I1<I2>>{...}" }
+// EXIST: { lookupString: "KotlinInheritor", itemText: "KotlinInheritor<I2>", tailText: "() (p)" }