GreatSyntacticShift: 'namespace' -> 'package'

compiler/testData/diagnostics/tests/NamespaceAsExpression.jet

@@ -5,4 +5,4 @@ package a {
 }
 
 val x = <!EXPRESSION_EXPECTED_NAMESPACE_FOUND!>a<!>
-val y2 = <!NAMESPACE_IS_NOT_AN_EXPRESSION!>namespace<!>
+val y2 = <!NAMESPACE_IS_NOT_AN_EXPRESSION!>package<!>

compiler/testData/diagnostics/tests/ShiftFunctionTypes.jet

@@ -1,12 +1,12 @@
 class A {
 }
 
-namespace n {
+package n {
   class B
 }
 abstract class XXX() {
     abstract val a : Int
-    abstract val a1 : namespace.<!UNRESOLVED_REFERENCE!>Int<!>
+    abstract val a1 : package.<!UNRESOLVED_REFERENCE!>Int<!>
     abstract val a2 : n.B
     abstract val a3 : (A)
     abstract val a31 : (n.B)

compiler/testData/diagnostics/tests/scopes/Imports.jet

@@ -1,5 +1,5 @@
 //FILE:a.kt
-namespace a
+package a
 
 import b.B        //class
 import b.foo      //function
@@ -14,7 +14,7 @@ fun test(arg: B) {
 }
 
 //FILE:b.kt
-namespace b
+package b
 
 class B() {}