The ls /etc/apb-secrets error isn't causing the APB to fail, though this should fix it, https://github.com/ansibleplaybookbundle/apb-base/pull/5

The failure is due to include_tasks being used with ansible 2.3.

We have updated the packages again (to use include_tasks) and we're getting ansible 2.4.0 on our downstream apb-base image now so all the deprecations and errors should hopefully sort out in the next puddle or so.

apb-base-scripts-1.0.5-1.el7 should fix the ls /etc/apb-secrets error.

A separate BZ exists for the include_tasks and ansible 2.4.0 work (though not for the errors your seeing specifically) and these should hopefully clear up as I believe that work is done as well.

https://github.com/ansibleplaybookbundle/apb-base/pull/5

Verified with latest images in rhcc reigstry:
apb-base:v3.7.4-2
mysql-apb:v3.7.4-2
mariadb-apb:v3.7.4-2

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:3188