Ignore @Nullable annotation for vararg parameter

See the comment in code for clarification

 #KT-19786 Fixed

compiler/testData/diagnostics/tests/j+k/signatureAnnotations/nullableVarargOverride.kt

@@ -0,0 +1,22 @@
+// FILE: BaseClass.java
+import org.jetbrains.annotations.Nullable;
+
+public class BaseClass {
+    public void loadCache(@Nullable Object... args) {}
+}
+
+// FILE: main.kt
+
+class A : BaseClass() {
+    // org.jetbrains.annotations.Nullable has @Target PARAMETER, so it doesn't affect elements type
+    override fun loadCache(vararg args: Any?) {
+        super.loadCache(*args)
+    }
+}
+
+class B : BaseClass() {
+    // org.jetbrains.annotations.Nullable has @Target PARAMETER, so it doesn't affect elements type
+    override fun loadCache(vararg args: Any) {
+        super.loadCache(*args)
+    }
+}