Sample to get vswitches.
Sample to get vswitches.

Signed-off-by: nickcooper-zhangtonghao <b8d9c4edf75a94088bb7efea42ddab02a96c2fb9@opencloud.tech>

prziborowski/pyvmomi-community-samples,vmware/pyvmomi-community-samples,jm66/pyvmomi-community-samples,ddcrjlalumiere/pyvmomi-community-samples,pathcl/pyvmomi-community-samples