Revert "Upgrade to testcontainers 1.15.0"

This reverts commit b1c446d.

Author: snicoll

spring-boot-project/spring-boot-parent/pom.xml

@@ -32,7 +32,7 @@
 		<spring-asciidoctor-extensions.version>0.4.0.RELEASE</spring-asciidoctor-extensions.version>
 		<spring-doc-resources.version>0.1.3.RELEASE</spring-doc-resources.version>
 		<spring-doc-resources.url>https://repo.spring.io/release/io/spring/docresources/spring-doc-resources/${spring-doc-resources.version}/spring-doc-resources-${spring-doc-resources.version}.zip</spring-doc-resources.url>
-		<testcontainers.version>1.15.0</testcontainers.version>
+		<testcontainers.version>1.14.3</testcontainers.version>
 		<testng.version>6.14.3</testng.version>
 	</properties>
 	<scm>