Polishing.

Use module identifier instead of constant.

Closes #2762

src/main/java/org/springframework/data/redis/repository/configuration/RedisRepositoryConfigurationExtension.java

@@ -61,7 +61,7 @@ public String getModuleName() {
 
 	@Override
 	protected String getModulePrefix() {
-		return "redis";
+		return this.getModuleIdentifier();
 	}
 
 	@Override