Changes

Summary

1. SPIGOT-6830: Fix addDefaults with Configuration overrides child Sections (details)
2. #686: Fix contains for default section generating real sections (details)

Commit 0912ace4df83bd6b7331a1e716925055fb33f3d5 by md_5 (md_5) SPIGOT-6830: Fix addDefaults with Configuration overrides child Sections in the defaults
	src/main/java/org/bukkit/configuration/MemoryConfiguration.java
	src/test/java/org/bukkit/configuration/ConfigurationTest.java
Commit e4358b8217126bbcc3a38b0d17097ad5ab87c50a by md_5 (md_5) #686: Fix contains for default section generating real sections
	src/test/java/org/bukkit/configuration/ConfigurationSectionTest.java
	src/main/java/org/bukkit/configuration/MemorySection.java