unclosed event loop

## Type of Issue

Select the type of issue:
- [x] Bug report (to report a bug)
- [ ] Feature request (to request an additional feature)
- [ ] Tracker (I am just using this as a tracker)
- [ ] Refactor request
- [ ] Documentation Ask

## Description
when running fake agent in pdb (e.g. when debugging integration tests) I get lots of

... droidlet_env/lib/python3.7/asyncio/base_events.py:626: ResourceWarning: unclosed event loop <_UnixSelectorEventLoop running=False closed=False debug=False>
source=self)
ResourceWarning: Enable tracemalloc to get the object allocation traceback

making it hard to use interactive debugger

## Steps to reproduce

pick any test (e.g. https://github.com/facebookresearch/fairo/blob/main/droidlet/interpreter/craftassist/tests/test_interpreter.py ) and put in a pdb.set_trace()

mess around a bit.