distro: add rhel7 driver.
Merge pull request #16 from hansode/feature-rhel7

distro: add rhel7 driver.
distro: fix detect_distro for rhel7.0 beta.
distro: define grub type for rhel7.
distro,test: add " to value.
distro: fix grub command set for rhel7.
Merge pull request #17 from hansode/feature-rhel7

Feature rhel7
distro: fix configure_serial_console for rhel7.
Merge pull request #18 from hansode/feature-rhel7

distro: fix configure_serial_console for rhel7.
netowrk -> network
Merge pull request #19 from hansode/fix-typo

netowrk -> network
hypervisor: add /usr/bin/qemu-kvm to kvm command list.
Merge pull request #20 from hansode/feature-fedora20-kvm

hypervisor: add /usr/bin/qemu-kvm to kvm command list.
disk: fix lodevice mapped case.
Merge pull request #21 from hansode/fix-teardown-lodevice

disk: fix lodevice mapped case.
Merge pull request #53 from hansode/master

rhel7 ready