Example for MSEHVI doesn't seem to run: "status_quo" issue

For context, I'm using the following versions of packages:
```
ax==0.52.0
ax-platform==0.2.3
botorch==0.6.0
```
When I try to run this code (by python3 -m examples.msehvi), I get the error
```
AttributeError: 'Metric' object has no attribute 'metric'
```
I solved this by changing for eg. line 20 of baselines/problems/simple_problems.py from
```
objective = MultiObjective([metric_a, metric_b])
```
to
```
objective = MultiObjective(objectives=[Objective(metric=metric_a), Objective(metric=metric_b)])
```

Now I get the error "ValueError: Optimization config has relative constraint, but model was not fit with status quo.", which I believe has to do with line 125-145 of baselines/methods/msehvi/msehvi.py. Could you please push a fix for this, or clarify the versions of libraries you used?