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
pkgs = []
        res = {}
        res['results'] = []
        res['msg'] = ''
        res['changed'] = False
        res['rc'] = 0
        for pkg in items:
            if pkg.startswith('@'):
                installed = self.is_group_env_installed(pkg)
            else:
                installed = self.is_installed(repoq, pkg)
            if installed:
                pkgs.append(pkg)
            else:
                res['results'].append('%s is not installed' % pkg)
        if pkgs:
            if self.module.check_mode:
                self.module.exit_json(changed=True, results=res['results'], changes=dict(removed=pkgs))
            else:
                res['changes'] = dict(removed=pkgs)
            
            if self.autoremove:
                cmd = self.yum_basecmd + ["autoremove"] + pkgs
            else: