Fix many issues with softlayer_hw cloud provider
The softlayer_hw provider did not support "create" with an instance ID like the
EC2 provider did to bootstrap an already-existing node.

In addition it had some weird queries like trying to call "virtualGuests" to
get the list of hardware servers (this won't work) and managed to get the
password from Softlayer's API but then didn't use it to log in for windows
machines.
Merge branch 'softlayer_hw' into playfab_develop