The latest libcloud 0.14 stopped supporting some of it's constants, namely:

```

    EC2_US_EAST
    EC2_US_WEST_OREGON
    EC2_EU
    EC2_EU_WEST
    EC2_AP_SOUTHEAST
    EC2_AP_SOUTHEAST2
    EC2_AP_NORTHEAST
    EC2_SA_EAST
```
If we try to use them, we'll get a traceback because they raise an `Exception` as opposed to a `DeprecationWarning` or an `AttributeError`. That last except takes care of that.