Get rid of underscores in private property names

They were used to workaround duplicate signature errors, but this is no longer
relevant since no accessors are generated for private properties with backing
fields

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/kotlin/incremental/IncrementalPackageFragmentProvider.kt

@@ -94,7 +94,7 @@ public class IncrementalPackageFragmentProvider(
         public val moduleId: String
             get() = this@IncrementalPackageFragmentProvider.moduleId
 
-        val _memberScope: NotNullLazyValue<JetScope> = storageManager.createLazyValue {
+        val memberScope: NotNullLazyValue<JetScope> = storageManager.createLazyValue {
             if (fqName !in fqNamesToLoad) {
                 JetScope.Empty
             }
@@ -109,16 +109,14 @@ public class IncrementalPackageFragmentProvider(
             }
         }
 
-        override fun getMemberScope(): JetScope {
-            return _memberScope()
-        }
+        override fun getMemberScope(): JetScope = memberScope()
 
         private inner class IncrementalPackageScope(val packageData: PackageData) : DeserializedPackageMemberScope(
                 this@IncrementalPackageFragment,
                 packageData.getPackageProto(),
                 deserializationContext.withNameResolver(packageData.getNameResolver()),
-                { listOf() }) {
-
+                { listOf() }
+        ) {
             override fun filteredMemberProtos(allMemberProtos: Collection<ProtoBuf.Callable>): Collection<ProtoBuf.Callable> {
                 return allMemberProtos
                         .filter {