virttest.remote: Support to handle prompts of ESX server.

Currently, remote.handle_prompts(...) only support ssh and telnet.
To connect ESX server with "esx://IP/...", it should add prompts
to matched list for esx connection.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
v2v.tests: Specify vm_type for v2v.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
virttest.bootstrap: Recover missing lines.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
v2v.tests: Add testcases for v2ving vmware vms.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
Merge pull request #821 from yumingfei/v2v_vmware

virt-v2v: testcases for converting vmware vms