ISSUE-2824 Adding user_data to rackspace provider
fixed misspelling

`settng` should be `setting`
Merge pull request #2855 from berendt/fix_typo_settng

fixed misspelling
Merge pull request #2826 from yannh/rackspace_cloud_init

ISSUE-2824 Adding user_data to rackspace provider
. fix ruby-libvirt library require name (libvirt)
Merge pull request #2860 from noushi/libvirt-fix_missing_tests

. fix ruby-libvirt library require name (libvirt)