Update checksums in specs according to changes in Redmine Core

Author: nanego

spec/checksums_spec.rb

@@ -10,6 +10,6 @@ def assert_checksum(expected, filename)
   it "checks core file application_helper checksums" do
     # several methods are overridden and should be reviewed if the checksum change
     # version 6.0.6 is OK
-    assert_checksum %w"ba954d7d5c77ecd13256f2bef721db73", "app/helpers/application_helper.rb"
+    assert_checksum %w"64ef301df3413f4a35cbfeb9c9dddeaa", "app/helpers/application_helper.rb"
   end
 end