Upgrade to MariaDB Java Client 1.4.0

Closes gh-5605

spring-boot-dependencies/pom.xml

@@ -118,7 +118,7 @@
 		<log4j2.version>2.5</log4j2.version>
 		<logback.version>1.1.7</logback.version>
 		<lombok.version>1.16.8</lombok.version>
-		<mariadb.version>1.3.6</mariadb.version>
+		<mariadb.version>1.4.0</mariadb.version>
 		<mockito.version>1.10.19</mockito.version>
 		<mongodb.version>2.14.1</mongodb.version>
 		<mysql.version>5.1.38</mysql.version>