Polishing.

Use synchronous API for ES test data setup to avoid threading during the bean container startup.

See #636

elasticsearch/reactive/pom.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<artifactId>spring-data-elasticsearch-reactive-example</artifactId>
@@ -17,6 +18,11 @@
 
 	<dependencies>
 
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-log4j2</artifactId>
+		</dependency>
+
 		<dependency>
 			<groupId>io.projectreactor</groupId>
 			<artifactId>reactor-test</artifactId>
@@ -25,6 +31,16 @@
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-webflux</artifactId>
+			<exclusions>
+				<exclusion>
+					<groupId>org.apache.logging.log4j</groupId>
+					<artifactId>log4j-to-slf4j</artifactId>
+				</exclusion>
+				<exclusion>
+					<groupId>ch.qos.logback</groupId>
+					<artifactId>logback-classic</artifactId>
+				</exclusion>
+			</exclusions>
 		</dependency>
 
 	</dependencies>