Testing replication between two appliances in different regions

This uses the single_appliance information in cfme_data.yaml to provision appliances. Currently the version specified in cfme_data.yaml is "version1", so my cfme_data.local.yaml adds a valid version number so it is able to provision:

```YAML
appliance_provisioning:
    provider: vsphere55
    single_appliance:
        name: single1
        version: 5.2.3.2
```
We could speed things up a little bit with some async work here...
```python
#sort making this up
from utils.async import ResultsPool

with ResultsPool() as pool:
   appl1_result = pool.apply_async(provision_appliance, (appliance_data['version'], appliance_data['name']))
   appl2_result = pool.apply_async(provision_appliance, (appliance_data['version'], appliance_data['name']))
assert pool.successful
appl1 = appl1_result.get()
appl2 = appl2_result.get()
```