Upgrade to JUnit 5.0.0-M2

Issue: SPR-13575

Author: sbrannen

build.gradle

@@ -62,8 +62,8 @@ configure(allprojects) { project ->
 	ext.jspVersion             = "2.3.2-b02"
 	ext.jtaVersion             = "1.2"
 	ext.junitVersion           = "4.12"
-	ext.junitJupiterVersion    = '5.0.0-M1'
-	ext.junitPlatformVersion   = '1.0.0-M1'
+	ext.junitJupiterVersion    = '5.0.0-M2'
+	ext.junitPlatformVersion   = '1.0.0-M2'
 	ext.log4jVersion           = '2.6.2'
 	ext.nettyVersion           = "4.1.3.Final"
 	ext.okhttpVersion          = "2.7.5"