Update libvirt.rst

The libvirt-python package is required to run salt-cloud against libvirt/KVM hosts. If it is not installed on the machine running salt-cloud, the crytic error below is all there is to go by:
```
[WARNING ] The cloud driver, 'libvirt', configured under the 'hagrid' cloud provider alias, could not be loaded. Please check your provider configuration files and ensure all required dependencies are installed for the 'libvirt' driver.
In rare cases, this could indicate the 'libvirt.get_configured_provider()' function could not be found.
Removing 'libvirt' from the available providers list
```
This commit is contained in:
Alek Tant 2017-07-30 18:33:47 -04:00 committed by GitHub
parent a2a7c475c1
commit 1729cc2919

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@ -8,10 +8,14 @@ libvirt with qemu-kvm.
http://www.libvirt.org/ http://www.libvirt.org/
Dependencies Host Dependencies
============ ============
* libvirt >= 1.2.18 (older might work) * libvirt >= 1.2.18 (older might work)
Salt-Cloud Dependencies
============
* libvirt-python
Provider Configuration Provider Configuration
====================== ======================