[vcloud_director] Mocking for tasks.
[vcloud_director] strftime not iso8601 for ruby 1.8.7
[vcloud_director] Consistent usage of ensure_list! in get_disk.
[vcloud_director] Fix ruby 1.9-isms in media_tests.
Removed errant :host argument
Add a reload() method to the vSphere service.

Like other compute services, it would be useful if vSphere also
supported reload(). The method should reestablish any session state
required for Fog when network errors arise (EPIPE, etc).

Fixes: #2307
Merge pull request #2311 from maginatics/vsphere_reload

Add a reload() method to the vSphere service.
Merge pull request #2309 from jtopper/master

Removed errant :host argument
Merge pull request #2302 from nosborn/vcloud_director_task_mocking

[vcloud_director] Mocking for tasks.