J2K: generate 'interface' keyword instead of 'trait'

j2k/testData/fileOrElement/trait/abstactInterface.kt

@@ -1 +1 @@
-trait I
+interface I

j2k/testData/fileOrElement/trait/emptyInterface.kt

@@ -1 +1 @@
-trait A
+interface A

j2k/testData/fileOrElement/trait/extendsOneClassAndImplementsSeveralInterfaces.kt

@@ -1 +1 @@
-trait A : I0, I1, I2
+interface A : I0, I1, I2

j2k/testData/fileOrElement/trait/extendsOneInterface.kt

@@ -1 +1 @@
-trait A : I
+interface A : I

j2k/testData/fileOrElement/trait/interfaceWithFields.kt

@@ -1,4 +1,4 @@
-trait INode {
+interface INode {
     companion object {
         public val IN: String = "in"
         public val AT: String = "@"

j2k/testData/fileOrElement/trait/interfaceWithMethodDeclaration.kt

@@ -1,4 +1,4 @@
-trait INode {
+interface INode {
     public fun getTag(): Tag
     public fun toKotlin(): String
 }

j2k/testData/fileOrElement/trait/interfaceWithStaticFields.kt

@@ -1,4 +1,4 @@
-public trait INode {
+public interface INode {
     companion object {
         public val IN: String = "in"
         public val AT: String = "@"

j2k/testData/fileOrElement/trait/internalInterface.kt

@@ -1 +1 @@
-trait Test
+interface Test

j2k/testData/fileOrElement/trait/privateInterface.kt

@@ -1 +1 @@
-private trait Test
+private interface Test

j2k/testData/fileOrElement/trait/protectedInterface.kt

@@ -1 +1 @@
-protected trait Test
+protected interface Test

j2k/testData/fileOrElement/trait/publicInterface.kt

@@ -1 +1 @@
-public trait Test
+public interface Test