[Qa] [Virt]【Avocado-vt】新增openEuler 20.09虚拟化特性用例及部分bugfix

Attachments:

• avocado-vt-patch.tar.gz (application/x-gzip — 1.9 KB)
• tp-libvirt-patch.tar.gz (application/x-gzip — 30.0 KB)
• tp-qemu-patch.tar.gz (application/x-gzip — 5.1 KB)