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