Sample views and reconfigure for VectorEnv

## Habitat-Lab and Habitat-Sim versions
Habitat-Lab: v0.1.7

Habitat-Sim: v0.1.7

Hi, I would like to sample the views, which means I need to reconfigure the environment for each episode. I found there's reconfigure in Env, but I was using VectorEnv and I couldn't find any relates to it. Could you please provide some possible directions to figure it out?


