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
```
re: the last comment, the [ResultsPool docs](http://cfme-tests.readthedocs.org/modules/utils/utils.async.html) were written before we had linking set up back to the main python docs. 

The main thing ResultsPool gets you is the 'successful' property so you can easily assert that all the parallel ops worked. The base class is documented here: https://docs.python.org/2/library/multiprocessing.html#module-multiprocessing.pool