Disable SNAPSHOT tests for release

Jenkinsfile

@@ -54,19 +54,6 @@ try {
 			}
 		}
 	},
-	snapshots: {
-		stage('Snapshot Tests') {
-			node {
-				checkout scm
-				try {
-					sh "./gradlew clean test -PspringVersion='5.+' -PreactorVersion=Bismuth-BUILD-SNAPSHOT -PspringDataVersion=Kay-BUILD-SNAPSHOT --refresh-dependencies --no-daemon --stacktrace"
-				} catch(Exception e) {
-					currentBuild.result = 'FAILED: snapshots'
-					throw e
-				}
-			}
-		}
-	},
 	jdk9: {
 		stage('JDK 9') {
 			node {