Description of problem:
incorrect option listed in /etc/yum/yum-cron.conf and /etc/yum/yum-cron-hourly.conf : the options listed for yum-security,

"""
[commands]
#  What kind of update to use:
# default                            = yum upgrade
# security                           = yum --security upgrade
# security-severity:Critical         = yum --sec-severity=Critical upgrade
# minimal                            = yum --bugfix upgrade-minimal
# minimal-security                   = yum --security upgrade-minimal
# minimal-security-severity:Critical =  --sec-severity=Critical upgrade-minimal
update_cmd = default

"""
are incorrectly mentioning upgrade-minimal instead of update-minimal

Version-Release number of selected component (if applicable):
# yum provides /etc/yum/yum-cron.conf 
Loaded plugins: langpacks, package_upload, product-id, rhnplugin, subscription-manager
This system is not registered with RHN Classic or Red Hat Satellite.
You can use rhn_register to register.
Red Hat Satellite or RHN Classic support will be disabled.
yum-3.4.3-118.el7.noarch : RPM package installer/updater/manager
Repo        : rhel-7-server-rpms
Matched from:
Filename    : /etc/yum/yum-cron.conf



yum-cron-3.4.3-118.el7.noarch : Files needed to run yum updates as a cron job
Repo        : rhel-7-server-optional-rpms
Matched from:
Filename    : /etc/yum/yum-cron.conf



yum-3.4.3-118.el7.noarch : RPM package installer/updater/manager
Repo        : @anaconda/7.0
Matched from:
Filename    : /etc/yum/yum-cron.conf



yum-cron-3.4.3-118.el7.noarch : Files needed to run yum updates as a cron job
Repo        : @rhel-7-server-optional-rpms
Matched from:
Filename    : /etc/yum/yum-cron.conf

additional info:

the yum-security man page are missing but the value is not correct. see bz#1182075 regarding the man page.