Add test for outdated smart cast with elvis issue

#KT-5335 Obsolete

compiler/testData/diagnostics/tests/smartCasts/elvisNothingRHS.kt

@@ -8,4 +8,4 @@ fun test(a: C?, nn: () -> Nothing?) {
 
     a ?: return
     <!DEBUG_INFO_SMARTCAST!>a<!>.foo()
-}
+}

compiler/testData/diagnostics/tests/smartCasts/elvisRHS.kt

@@ -0,0 +1,10 @@
+// !DIAGNOSTICS: -UNUSED_VARIABLE
+
+// KT-5335
+
+fun foo(p1: String?, p2: String?) {
+    if (p2 != null) {
+        val v = p1 ?: <!DEBUG_INFO_SMARTCAST!>p2<!>
+        val size = v.length
+    }
+}

compiler/testData/diagnostics/tests/smartCasts/elvisRHS.txt

@@ -0,0 +1,3 @@
+package
+
+internal fun foo(/*0*/ p1: kotlin.String?, /*1*/ p2: kotlin.String?): kotlin.Unit

compiler/tests/org/jetbrains/jet/checkers/JetDiagnosticsTestGenerated.java

@@ -9356,9 +9356,15 @@ public class JetDiagnosticsTestGenerated extends AbstractJetDiagnosticsTest {
                 doTest(fileName);
             }
             
-            @TestMetadata("elvis.kt")
+            @TestMetadata("elvisNothingRHS.kt")
-            public void testElvis() throws Exception {
+            public void testElvisNothingRHS() throws Exception {
-                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/elvis.kt");
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/elvisNothingRHS.kt");
+                doTest(fileName);
+            }
+            
+            @TestMetadata("elvisRHS.kt")
+            public void testElvisRHS() throws Exception {
+                String fileName = JetTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/smartCasts/elvisRHS.kt");
                 doTest(fileName);
             }
             

j2k/src/org/jetbrains/jet/j2k/ConstructorConverter.kt

@@ -84,7 +84,7 @@ class ConstructorConverter(private val psiClass: PsiClass,
                             else
                                 null
                         }
-                        val finalTarget = finalTargetInfo?.constructor ?: target!! //TODO: see KT-5335
+                        val finalTarget = finalTargetInfo?.constructor ?: target
 
                         toTargetConstructorMap[constructor] = TargetConstructorInfo(finalTarget, parameterDefaults)
                         for (entry in toTargetConstructorMap.entrySet()) {