Merge branch 'jpn/fix-sdk' into 'master'

[CHORE][SDK] downgrade undertow

See merge request codingame/game-engine!320

Author: CGjupoulton

runner/pom.xml

@@ -28,7 +28,7 @@
 		<dependency>
 			<groupId>io.undertow</groupId>
 			<artifactId>undertow-core</artifactId>
-			<version>2.3.8.Final</version>
+			<version>2.0.25.Final</version>
 		</dependency>
 		<dependency>
 			<groupId>commons-io</groupId>