Upgrade to mariadb-java-client 1.2.1

Closes gh-3877

spring-boot-dependencies/pom.xml

@@ -110,7 +110,7 @@
 		<log4j.version>1.2.17</log4j.version>
 		<log4j2.version>2.3</log4j2.version>
 		<logback.version>1.1.3</logback.version>
-		<mariadb.version>1.2.0</mariadb.version>
+		<mariadb.version>1.2.1</mariadb.version>
 		<mockito.version>1.10.19</mockito.version>
 		<mongodb.version>2.13.2</mongodb.version>
 		<mysql.version>5.1.36</mysql.version>