KT-3459 "import java.util.*" is removed by optimize imports if the only usage is a SAM constructor

#KT-3459 fixed

idea/testData/editor/optimizeImports/SamConstructor.kt

@@ -0,0 +1,3 @@
+import java.util.*
+
+val c = Comparator {(x: Int, y: Int) -> 1}

idea/testData/editor/optimizeImports/SamConstructor_after.kt

@@ -0,0 +1,3 @@
+import java.util.*
+
+val c = Comparator {(x: Int, y: Int) -> 1}

idea/testData/resolve/SamConstructor.kt

@@ -0,0 +1 @@
+val c = java.util.<caret>Comparator {(x: Int, y: Int) -> 1}

idea/tests/org/jetbrains/jet/plugin/importOptimizer/OptimizeImportsTest.java

@@ -81,6 +81,10 @@ public class OptimizeImportsTest extends LightCodeInsightTestCase {
         doTest();
     }
 
+    public void testSamConstructor() throws Exception {
+        doTest();
+    }
+
     public void doTest() throws Exception {
         configureByFile(fileName());
         invokeFormatFile();

idea/tests/org/jetbrains/jet/resolve/ResolveBaseTest.java

@@ -50,6 +50,10 @@ public class ResolveBaseTest extends LightCodeInsightTestCase {
         doSingleResolveTest("test1");
     }
 
+    public void testSamConstructor() throws Exception {
+        doSingleResolveTest("(java.util).Comparator");
+    }
+
     public void testSeveralOverrides() throws Exception {
         doMultiResolveTest();
     }