Upgrade to Spring Plugin 1.2.0.RELEASE

Closes gh-2605

Author: wilkinsona

spring-boot-dependencies/pom.xml

@@ -128,7 +128,7 @@
 		<spring-integration.version>4.2.0.BUILD-SNAPSHOT</spring-integration.version>
 		<spring-loaded.version>1.2.1.RELEASE</spring-loaded.version>
 		<spring-mobile.version>1.1.3.RELEASE</spring-mobile.version>
-		<spring-plugin.version>1.1.0.RELEASE</spring-plugin.version>
+		<spring-plugin.version>1.2.0.RELEASE</spring-plugin.version>
 		<spring-security.version>4.0.1.RELEASE</spring-security.version>
 		<spring-security-jwt.version>1.0.3.RELEASE</spring-security-jwt.version>
 		<spring-social.version>1.1.0.RELEASE</spring-social.version>