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/LedgerServiceImpl.java

@@ -0,0 +1,17 @@
+package com.baeldung;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Created by johnson on 3/9/17.
+ */
+public class LedgerServiceImpl implements LedgerServiceInterface {
+
+    String[] returnArray = {"entry1","entry2","entry3"};
+
+    @Override
+    public List<String> getEntries(int count) {
+        return Arrays.asList(returnArray);
+    }
+}