compiler testdata: s/trait/interface

compiler/testData/diagnostics/tests/extensions/ExtensionsCalledOnSuper.kt

@@ -1,4 +1,4 @@
-trait T {
+interface T {
     fun foo() {}
     fun buzz() {}
     fun buzz1(i : Int) {}

compiler/testData/diagnostics/tests/extensions/GenericIterator.kt

@@ -6,7 +6,7 @@ fun <T> java.util.Enumeration<T>.iterator() = object: Iterator<T> {
   override fun next() = nextElement()
 }
 
-trait MyIterator<T> {
+interface MyIterator<T> {
 
   fun hasNext() : Boolean
 

compiler/testData/diagnostics/tests/extensions/classObject.kt

@@ -1,4 +1,4 @@
-trait Tr
+interface Tr
 
 class A { companion object }
 class B { companion object : Tr }

compiler/testData/diagnostics/tests/extensions/extensionMemberInClassObject.kt

@@ -1,6 +1,6 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER
 
-trait JPAEntityClass<D> {
+interface JPAEntityClass<D> {
     fun <T> T.findByName(s: String): D {null!!}
 }
 

compiler/testData/diagnostics/tests/extensions/kt1875.kt

@@ -4,7 +4,7 @@ package kt1875
 
 fun f(a : Int?, b : Int.(Int)->Int) = a?.b(1) //unnecessary safe call warning
 
-trait T {
+interface T {
     val f : ((i: Int) -> Unit)?
 }
 

compiler/testData/diagnostics/tests/extensions/throwOutCandidatesByReceiver.kt

@@ -23,7 +23,7 @@ fun test3(s: String?) {
     s.<!UNRESOLVED_REFERENCE_WRONG_RECEIVER!>foo<!>("a")
 }
 
-trait A
+interface A
 fun <T: A> T.c() {}
 
 fun test4() {