I am using the yum module to lock the release version for a RHEL 7.6 machine to 7.7 version. However the yum --releasever option does not set the release version to 7.7. I am using Ansible 2.7.10 version.
Here is the discussion regarding the issue: 
https://access.redhat.com/discussions/4774501

ISSUE TYPE
Bug Report

COMPONENT NAME
yum --releasever

ANSIBLE VERSION
2.7.10 

STEPS TO REPRODUCE
name: installing updated packages
yum:
name: '*'
state: latest
releasever: '7.7'

ACTUAL RESULTS
Play runs successfully however it does not update the release version of the server
description:
      - If set to C(yes), and C(state=latest) then only installs updates that have been marked security related.
    type: bool
    default: "no"
    version_added: "2.4"
  bugfix:
    description:
      - If set to C(yes), and C(state=latest) then only installs updates that have been marked bugfix related.
    default: "no"
    version_added: "2.6"
  allow_downgrade:
    description:
      - Specify if the named package and version is allowed to downgrade
        a maybe already installed higher version of that package.
        Note that setting allow_downgrade=True can make this module
        behave in a non-idempotent way. The task could end up with a set
        of packages that does not match the complete list of specified
        packages to install (because dependencies between the downgraded
        package and others can cause changes to the packages which were
        in the earlier transaction).
    type: bool
    default: "no"
    version_added: "2.4"
  enable_plugin:
    description:
      - I(Plugin) name to enable for the install/update operation.
        The enabled plugin will not persist beyond the transaction.
    version_added: "2.5"
  disable_plugin:
    description: