Replace "jet" package name with "kotlin" in testData

compiler/testData/diagnostics/tests/regressions/kt334.kt

@@ -1,6 +1,6 @@
 import <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>java.lang.Comparable<!> as Comparable
 
 fun f(c: <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>Comparable<*><!>) {
-    <!TYPE_MISMATCH!>c<!>: jet.Comparable<*>
+    <!TYPE_MISMATCH!>c<!>: kotlin.Comparable<*>
     c: <!PLATFORM_CLASS_MAPPED_TO_KOTLIN!>java.lang.Comparable<*><!>
 }

compiler/testData/diagnostics/tests/scopes/kt1579_map_entry.kt

@@ -1,7 +1,7 @@
 //FILE:a.kt
 //+JDK
 package a
-import jet.Map.*
+import kotlin.Map.*
 
 fun foo(b : Entry<String, String>) = b
 
@@ -9,7 +9,7 @@ fun foo(b : Entry<String, String>) = b
 //+JDK
 package b
 
-import jet.Map.Entry
+import kotlin.Map.Entry
 fun bar(b : Entry<String, String>) = b
 
 //FILE:c.kt