Include Bintray plugin repository.

Closes #2154.

Author: mp911de

pom.xml

@@ -532,8 +532,9 @@
 			<url>https://repo.spring.io/plugins-release</url>
 		</pluginRepository>
 		<pluginRepository>
-			<id>spring-libs-milestone</id>
-			<url>https://repo.spring.io/libs-milestone</url>
+			<id>bintray-plugins</id>
+			<name>bintray-plugins</name>
+			<url>https://jcenter.bintray.com</url>
 		</pluginRepository>
 	</pluginRepositories>