INTEXT-71 Update MQTT Extension to SI 3.0.0.M2

spring-integration-mqtt/build.gradle

@@ -14,7 +14,7 @@ apply plugin: 'idea'
 group = 'org.springframework.integration'
 
 repositories {
-	maven { url 'http://repo.springsource.org/libs-snapshot' }
+	maven { url 'http://repo.springsource.org/milestone' }
 	maven { url 'http://repo.springsource.org/plugins-release' }
 }
 
@@ -26,7 +26,7 @@ ext {
 	log4jVersion = '1.2.17'
 	mockitoVersion = '1.9.5'
 	springVersion = '3.1.3.RELEASE'
-	springIntegrationVersion = '3.0.0.BUILD-SNAPSHOT'
+	springIntegrationVersion = '3.0.0.M2'
 
 	idPrefix = 'mqtt'