I got it.
Step 1.
Create an user on remote mysql server and grant all privileges.
Step 2.
Change datasource url
spring.datasource.url=jdbc:mysql://xxx.xxx.xxx.xxx:3306/dbtest
Step 3.
Change pom.xml mysql
mysql
mysql-connector-java
5.1.6
Check that version is changed to 5.1.6 from runtime