Don't fail when checking for FIPS
Don't fail when checking for FIPS

The check for FIPS in the proc filesystem causes the playbook to halt
if the path doesn't exist. This shouldn't happen because the next
task is the one that explains to the deployer that FIPS isn't enabled.

This patch allows the playbook to keep running so the appropriate
debug message can be printed.

Closes-Bug: 1659001
Change-Id: I4023b8e85e61a8e9883045ef488c75e65790035a

major/openstack-ansible-security,major/openstack-ansible-security