Upgrade to Logback 1.1.2

Author: wilkinsona

spring-boot-dependencies/pom.xml

@@ -71,7 +71,7 @@
 		<lettuce.version>2.3.3</lettuce.version>
 		<liquibase.version>3.1.1</liquibase.version>
 		<log4j.version>1.2.17</log4j.version>
-		<logback.version>1.1.1</logback.version>
+		<logback.version>1.1.2</logback.version>
 		<mockito.version>1.9.5</mockito.version>
 		<mongodb.version>2.11.4</mongodb.version>
 		<mysql.version>5.1.29</mysql.version>