如何在Cloudbees上更改MySQL root用户的默认密码？

We are running Jenkins on Cloudbees for building our code base from Github repo for MifosX. For our Integration Test job, we need to create a MySQL DB before each run. We have been able to do that, but would like to change the default MySQL credentials which are "root" and blank password, to some specific "password". Can someone guide us on how to do that? We are running Jenkins on Cloudbees for buildin