Make proper scope for property declaration

Make sure same scope is used for both property creation and for properly body resolution.
This fixes KT-421 Strange 'unresolved' bug with backing fields.

compiler/testData/checkerWithErrorTypes/quick/UninitializedOrReassignedVariables.jet

@@ -243,7 +243,7 @@ class Outer() {
 }
 
 class ForwardAccessToBackingField() { //kt-147
-    val a = <!UNRESOLVED_REFERENCE, UNINITIALIZED_VARIABLE!>$a<!> // error
+    val a = <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM, UNINITIALIZED_VARIABLE!>$a<!> // error
     val b = <!UNINITIALIZED_VARIABLE!>$c<!> // error
     val c = 1
 }
@@ -349,4 +349,4 @@ fun test(m : M) {
 fun test1(m : M) {
     <!VAL_REASSIGNMENT!>m.x<!>++
     m.y--
-}
+}

compiler/testData/checkerWithErrorTypes/quick/backingField/CyclicReferenceInitializer.jet

@@ -1,3 +1,3 @@
 class Cyclic() {
-    val a = <!UNRESOLVED_REFERENCE, UNINITIALIZED_VARIABLE!>$a<!>
+    val a = <!TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM, UNINITIALIZED_VARIABLE!>$a<!>
 }

compiler/testData/checkerWithErrorTypes/quick/regressions/kt421Scopes.jet

@@ -0,0 +1,8 @@
+// http://youtrack.jetbrains.net/issue/KT-421
+// KT-421 Strange 'unresolved' bug with backing fields
+
+class A() {
+    val c = 1
+    val a = <!UNINITIALIZED_VARIABLE!>b<!>
+    val b = $c  // '$c' is unresolved
+}