Add groupId to spring-cloud-stream-starter-build

Author: ryanjbaxter

bom/pom.xml

@@ -3,6 +3,7 @@
 		 xmlns="http://maven.apache.org/POM/4.0.0"
 		 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
+	<groupId>org.springframework.cloud</groupId>
 	<artifactId>spring-cloud-stream-starter-build</artifactId>
 	<packaging>pom</packaging>
 	<name>spring-cloud-stream-release-build</name>