The new version of botcore adds this region: f7dc4730ad (diff-9dfab05d4ba739e097a193e8b5fa61caR13)
Which in turn, breaks moto:
```
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/__init__.py:3: in <module>
from .acm import mock_acm # noqa
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/acm/__init__.py:2: in <module>
from .models import acm_backends
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/acm/models.py:7: in <module>
from moto.ec2 import ec2_backends
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/__init__.py:2: in <module>
from .models import ec2_backends
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:5169: in <module>
ec2_backends = {
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:5170: in <dictcomp>
region.name: EC2Backend(region.name) for region in RegionsAndZonesBackend.regions
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:5083: in __init__
super(EC2Backend, self).__init__()
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:852: in __init__
super(InstanceBackend, self).__init__()
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:1127: in __init__
super(TagBackend, self).__init__()
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:2368: in __init__
super(EBSBackend, self).__init__()
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:1904: in __init__
super(SecurityGroupBackend, self).__init__()
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:1355: in __init__
self._load_amis()
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:1362: in _load_amis
self.amis[ami_id] = Ami(self, **ami)
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:1313: in __init__
volume = self.ec2_backend.create_volume(15, region_name)
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:2372: in create_volume
zone = self.get_zone_by_name(zone_name)
/moto-1.3.15.dev640-py2.py3-none-any.whl/moto/ec2/models.py:1713: in get_zone_by_name
for zone in self.zones[self.region_name]:
E KeyError: 'af-south-1'
```
The "request" object in CallbackResponse is the PreparedRequest send by
whatever client is used to contact the mocked moto service. This can end
up with unparsed bodies, as we added for processing presigned post
requests in #2155. This will make sure that all of the requests comming
in from mocked functions also get processed by werkzeug as if it was
running a live server.
