Revert "Polish "How-to: Implement core services with JPA""

This reverts commit 36d18312b07b3a168de44d3cbf2624dced9a43cc.

docs/antora.yml

@@ -9,3 +9,7 @@ nav:
   - modules/ROOT/nav.adoc
   - modules/guides/nav.adoc
   - modules/appendix/nav.adoc
+asciidoc:
+  attributes:
+    docs-dir: ../../..
+    root-dir: ../../../..

docs/local-antora-playbook.yml

@@ -8,7 +8,7 @@ asciidoc:
 content:
   sources:
     - url: ../
-      branches: [main]
+      branches: [jpa-guide]
       start_path: docs
 ui:
   bundle:

samples/messages-client/src/main/resources/application.yml

@@ -5,7 +5,7 @@ logging:
   level:
     root: INFO
     org.springframework.web: INFO
-    org.springframework.security: INFO
+    org.springframework.security: trace
     org.springframework.security.oauth2: INFO
 #    org.springframework.boot.autoconfigure: DEBUG