Change galera bootstrap scripts files permissions

During Galera bootstrap stage the following help scripts are created:
    /usr/local/sbin/galera_init.sh
    /usr/local/sbin/galera_bootstrap.sh
Both contain mysql root password in a plain text.

Set file permissions to 750

Change-Id: Ie0d5fa7f81ef7ccbd6b9def7a4f2141c32dcc4ee
Relaited-prod: https://mirantis.jira.com/browse/PROD-15487
2 files changed