KT-2499 If Java class is imported, it is visible in completion three times: as Java class, Kotlin class and package

- Add java trace into delegation for lazy resolve session
 #KT-2499 Fixed

compiler/frontend/src/org/jetbrains/jet/lang/resolve/lazy/ResolveSession.java

@@ -31,6 +31,7 @@ import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.BindingContext;
 import org.jetbrains.jet.lang.resolve.BindingTrace;
 import org.jetbrains.jet.lang.resolve.BindingTraceContext;
+import org.jetbrains.jet.lang.resolve.ObservableBindingTrace;
 import org.jetbrains.jet.lang.resolve.name.FqName;
 import org.jetbrains.jet.lang.resolve.name.FqNameUnsafe;
 import org.jetbrains.jet.lang.resolve.name.Name;
@@ -53,7 +54,7 @@ public class ResolveSession {
     private final ModuleDescriptor module;
     private final LazyPackageDescriptor rootPackage;
 
-    private final BindingTrace trace = new BindingTraceContext();
+    private final BindingTrace trace;
     private final DeclarationProviderFactory declarationProviderFactory;
 
     private final Predicate<FqNameUnsafe> specialClasses;
@@ -70,7 +71,25 @@ public class ResolveSession {
         @NotNull ModuleConfiguration moduleConfiguration,
         @NotNull DeclarationProviderFactory declarationProviderFactory
     ) {
-        this(project, rootDescriptor, moduleConfiguration, declarationProviderFactory, NO_ALIASES, Predicates.<FqNameUnsafe>alwaysFalse());
+        this(project, rootDescriptor, moduleConfiguration, declarationProviderFactory, NO_ALIASES,
+             Predicates.<FqNameUnsafe>alwaysFalse(),
+             new BindingTraceContext());
+    }
+
+    public ResolveSession(
+            @NotNull Project project,
+            @NotNull ModuleDescriptor rootDescriptor,
+            @NotNull ModuleConfiguration moduleConfiguration,
+            @NotNull DeclarationProviderFactory declarationProviderFactory,
+            @NotNull BindingTrace delegationTrace
+    ) {
+        this(project,
+             rootDescriptor,
+             moduleConfiguration,
+             declarationProviderFactory,
+             NO_ALIASES,
+             Predicates.<FqNameUnsafe>alwaysFalse(),
+             delegationTrace);
     }
 
     @Deprecated // Internal use only
@@ -80,10 +99,12 @@ public class ResolveSession {
             @NotNull ModuleConfiguration moduleConfiguration,
             @NotNull DeclarationProviderFactory declarationProviderFactory,
             @NotNull Function<FqName, Name> classifierAliases,
-            @NotNull Predicate<FqNameUnsafe> specialClasses
+            @NotNull Predicate<FqNameUnsafe> specialClasses,
+            @NotNull BindingTrace delegationTrace
     ) {
         this.classifierAliases = classifierAliases;
         this.specialClasses = specialClasses;
+        this.trace = new ObservableBindingTrace(delegationTrace);
         this.injector = new InjectorForLazyResolve(project, this, trace, moduleConfiguration);
         this.module = rootDescriptor;
         this.moduleConfiguration = moduleConfiguration;

compiler/frontend/src/org/jetbrains/jet/lang/types/lang/KotlinBuiltIns.java

@@ -17,7 +17,10 @@
 package org.jetbrains.jet.lang.types.lang;
 
 import com.google.common.base.Predicates;
-import com.google.common.collect.*;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Sets;
 import com.intellij.openapi.progress.ProcessCanceledException;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.io.FileUtil;
@@ -35,6 +38,7 @@ import org.jetbrains.jet.lang.psi.JetFile;
 import org.jetbrains.jet.lang.psi.JetImportDirective;
 import org.jetbrains.jet.lang.psi.JetPsiFactory;
 import org.jetbrains.jet.lang.resolve.BindingTrace;
+import org.jetbrains.jet.lang.resolve.BindingTraceContext;
 import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.ImportPath;
 import org.jetbrains.jet.lang.resolve.lazy.FileBasedDeclarationProviderFactory;
@@ -230,7 +234,8 @@ public class KotlinBuiltIns {
                         return ALIASES.get(name);
                     }
                 },
-                Predicates.in(Sets.newHashSet(new FqNameUnsafe("jet.Any"), new FqNameUnsafe("jet.Nothing"))));
+                Predicates.in(Sets.newHashSet(new FqNameUnsafe("jet.Any"), new FqNameUnsafe("jet.Nothing"))),
+                new BindingTraceContext());
     }
 
     @NotNull