Fix createSection getting sections from itself. Fixes BUKKIT-1513

By: feildmaster <admin@feildmaster.com>

paper-api/src/main/java/org/bukkit/configuration/MemorySection.java

@@ -243,7 +243,7 @@ public class MemorySection implements ConfigurationSection {
         for (int i = 0; i < split.length - 1; i++) {
             ConfigurationSection last = section;
 
-            section = getConfigurationSection(split[i]);
+            section = last.getConfigurationSection(split[i]);
 
             if (section == null) {
                 section = last.createSection(split[i]);

paper-api/src/test/java/org/bukkit/configuration/ConfigurationTest.java

@@ -3,7 +3,9 @@ package org.bukkit.configuration;
 import java.util.LinkedHashMap;
 import java.util.Arrays;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
 import org.bukkit.util.Vector;
 import org.junit.Test;
 import static org.junit.Assert.*;
@@ -120,6 +122,25 @@ public abstract class ConfigurationTest {
         }
     }
 
+    /**
+     * Test creation of ConfigurationSection
+     */
+    @Test
+    public void testCreateSection() {
+        Configuration config = getConfig();
+
+        Set<String> set = new HashSet<String>();
+        set.add("this");
+        set.add("this.test.sub");
+        set.add("this.test");
+        set.add("this.test.other");
+
+        config.createSection("this.test.sub");
+        config.createSection("this.test.other");
+
+        assertEquals(set, config.getKeys(true));
+    }
+
     /**
      * Test of getDefaults method, of class Configuration.
      */