ansible_2_8: 2.8.4 -> 2.8.7

This addresses the following security issues:

  * Ansible: Splunk and Sumologic callback plugins leak sensitive data in logs (CVE-2019-14864)
  * CVE-2019-14846 - Several Ansible plugins could disclose aws
    credentials in log files. inventory/aws_ec2.py, inventory/aws_rds.py,
    lookup/aws_account_attribute.py, and lookup/aws_secret.py,
    lookup/aws_ssm.py use the boto3 library from the Ansible process. The
    boto3 library logs credentials at log level DEBUG. If Ansible's
    logging was enabled (by setting LOG_PATH to a value) Ansible would set
    the global log level to DEBUG. This was inherited by boto and would
    then log boto credentials to the file specified by LOG_PATH. This did
    not affect aws ansible modules as those are executed in a separate
    process. This has been fixed by switching to log level INFO
  * Convert CLI provided passwords to text initially, to prevent unsafe
    context being lost when converting from bytes->text during post
    processing of PlayContext. This prevents CLI provided passwords from
    being incorrectly templated (CVE-2019-14856)
  * properly hide parameters marked with no_log in suboptions when
    invalid parameters are passed to the module (CVE-2019-14858)

Changelog: https://github.com/ansible/ansible/blob/24220a618a6d5cd3b5c99f8c7f7771661ed08d33/changelogs/CHANGELOG-v2.8.rst