Generate not-null assertions only for descriptors coming from Java

Introduce BindingContext.IS_DECLARED_IN_JAVA, store that info in
JavaDescriptorResolver

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/resolver/FunctionResolver.java

@@ -130,6 +130,10 @@ public final class FunctionResolver {
             BindingContextUtils.recordFunctionDeclarationToDescriptor(javaDescriptorResolver.getTrace(), psiMethod, functionDescriptorImpl);
         }
 
+        if (!scopeData.isKotlin()) {
+            javaDescriptorResolver.getTrace().record(BindingContext.IS_DECLARED_IN_JAVA, functionDescriptorImpl);
+        }
+
         if (containingClass != psiClass && !method.isStatic()) {
             throw new IllegalStateException("non-static method in subclass");
         }

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/resolver/PropertiesResolver.java

@@ -275,6 +275,9 @@ public final class PropertiesResolver {
                 trace.record(BindingContext.OBJECT_DECLARATION_CLASS, propertyDescriptor, objectDescriptor);
             }
 
+            if (!scopeData.isKotlin()) {
+                trace.record(BindingContext.IS_DECLARED_IN_JAVA, propertyDescriptor);
+            }
 
             propertiesFromCurrent.add(propertyDescriptor);
         }