#1634 - Update Testcontainers dependency. (#1635)

Original Pull Request: #1635 
Closes #1634

Author: sothawo

pom.xml

@@ -23,6 +23,7 @@
 		<log4j>2.13.3</log4j>
 		<netty>4.1.52.Final</netty>
 		<springdata.commons>2.5.0-SNAPSHOT</springdata.commons>
+		<testcontainers>1.15.1</testcontainers>
 		<java-module-name>spring.data.elasticsearch</java-module-name>
 	</properties>