group persistence modules (#2890)

* move security content from spring-security-rest-full

* swagger update

* move query language to new module

* rename spring-security-rest-full to spring-rest-full

* group persistence modules

persistence-modules/redis/src/main/java/com/baeldung/Ledger.java

@@ -0,0 +1,21 @@
+package com.baeldung;
+
+public class Ledger {
+
+    public Ledger() {
+    }
+
+    public Ledger(String name) {
+        this.name = name;
+    }
+
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}