fixed trivial file rename errors.

git-svn-id: svn://bind10.isc.org/svn/bind10/branches/trac381@3281 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/tests/tsigkey_unittest.cc

@@ -20,7 +20,7 @@
 
 #include <exceptions/exceptions.h>
 
-#include <dns/tsig.h>
+#include <dns/tsigkey.h>
 
 #include <dns/tests/unittest_util.h>
 

src/lib/dns/tsigkey.cc

@@ -21,7 +21,7 @@
 #include <exceptions/exceptions.h>
 
 #include <dns/name.h>
-#include <dns/tsig.h>
+#include <dns/tsigkey.h>
 
 using namespace std;