Used older 'core' for master (only the refacturing branch will use latest core).

Signed-off-by: Roland Häder <haeder@hmmdeutschland.de>

diff --git a/core b/core
index 3333662bc8456250b12127c35a9365b403c1f40a..882c6e83b89e5c168812498025b9c48857edb952 160000 (submodule)
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit 3333662bc8456250b12127c35a9365b403c1f40a
+Subproject commit 882c6e83b89e5c168812498025b9c48857edb952