update section Installing JBoss Web Server from RPM Packages

Note: cloned from JBCS
Update to (with additional changes):
Installing JBoss Web Server from RPM Packages
NOTE
This option is only available on Red Hat Enterprise Linux Server.
Before downloading and installing the RPM packages, you must register your system with Red Hat Subscription Management and subscribe to the respective Content Delivery Network (CDN) repositories.

1. Log in to Red Hat Subscription Manager.
2. Click on Systems.
3. Click on the `name` of the system to add the subscription to.
4. Change to the Subscriptions tab, then select `Attach Subscriptions`
5. Attach ??????

Subscribe to the JBoss Core Services CDN repositories for your operating system version and architecture:

For Red Hat Enterprise Linux 6:

jb-coreservices-1-for-rhel-6-server-rpms

For Red Hat Enterprise Linux 7:

jb-coreservices-1-for-rhel-7-server-rpms

Add the relevant repository using `yum-config-manager`:

yum-config-manager --enable jb-coreservices-1-for-rhel-7-server-rpms

Run the following command as the root user to install Apache HTTP Server:

yum groupinstall jbcs-httpd24