The tasks/security.yml is unconditionally included, and since the commit above includes enabling security.
I imagine the fix would be to only include tasks/security.yml if a 'security' option is enabled, but I'm not sure what the intention of the initial tasks/security.yml was.
Security is enabled by default
I believe it started with this commit: https://github.com/basho-labs/ansible-riak/commit/4464591b613a046903eaca7a4888ff1cac9e4b59
The tasks/security.yml is unconditionally included, and since the commit above includes enabling security.
I imagine the fix would be to only include tasks/security.yml if a 'security' option is enabled, but I'm not sure what the intention of the initial tasks/security.yml was.