add missing test manifest

bubble-server/src/test/resources/models/manifest-user-block.json

@@ -0,0 +1,5 @@
+[
+  "apps/user_block/bubbleApp_userBlock",
+  "apps/user_block/hn_test/bubbleApp_userBlock_hn",
+  "apps/user_block/hn_test/bubbleApp_userBlock_hn_matchers"
+]