add configuration for virsh undefine

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
modify define,undefine function

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
modify define/undefine usages in libvirt_vm

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
add test for virsh undefine

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>
fix code style of virsh undefine.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
Add some illustrations for undefine configuration.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
shared.cfg: Add guest RHEL-5.9

rhel-server-5.9-i386-dvd.iso   e47da2a9b05a97cea5663a30642ecdd4
rhel-server-5.9-x86_64-dvd.iso 83e601da2282073aef3fcbd03b50802f

Signed-off-by: Qingtang Zhou <qzhou@redhat.com>
shared: Add guest os Fedora test

Fedora test release means the next major release of Fedora.
Now the test release is Fedora-18 Beta.

Signed-off-by: Qingtang Zhou <qzhou@redhat.com>