Upgrade to JUnit 5.0 M3

Issue: SPR-14924

Author: jhoeller

build.gradle

@@ -67,8 +67,8 @@ configure(allprojects) { project ->
 	ext.jspVersion             = "2.3.2-b02"
 	ext.jtaVersion             = "1.2"
 	ext.junitVersion           = "4.12"
-	ext.junitJupiterVersion    = '5.0.0-M2'
-	ext.junitPlatformVersion   = '1.0.0-M2'
+	ext.junitJupiterVersion    = '5.0.0-M3'
+	ext.junitPlatformVersion   = '1.0.0-M3'
 	ext.kotlinVersion          = "1.0.5-2"
 	ext.log4jVersion           = '2.7'
 	ext.nettyVersion           = "4.1.6.Final"