Oracle Linux 7.0 x86_64 template

Oracle Linux 7.0 x86_64 template, tested and confirmed to work.

Missing `libselinux-ruby` package from Oracle Linux 7.0 base repo, worked around it by borrowing the [package](http://mirror.centos.org/centos/7/os/x86_64/Packages/libselinux-ruby-2.2.2-6.el7.x86_64.rpm) from CentOS 7.0 ;-D

New
- Moved all initial provisioning from `base.sh` to Kickstart file -> `ks.cfg` for better reliability
- Optional provision shell script -> `provision.sh`
- Will update the template 1. once the `libselinux-ruby` is made available 2. EPEL comes out of beta.