Added apache httpclient dependency module to pom file.

Author: tobiasake

pom.xml

@@ -38,6 +38,11 @@
 			<artifactId>spring-boot-devtools</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.httpcomponents</groupId>
+			<artifactId>httpclient</artifactId>
+			<version>4.5.3</version>
+		</dependency>
 	</dependencies>
 	<build>
 		<plugins>