Fixes the destroy() method for the Docker virt driver

* Added the missing "context" argument in nova/virt/driver.py
* Added the missing argument in the test_virt_drivers.destroy() as well so it
will make sure none of the other drivers will miss it.

Change-Id: I083b935da95c28ad4f9879036ef2bf7c1fbbb58e
Closes-Bug: #1244829
Parted 'invalid option' in XenAPI driver

/sbin/parted is throwing an 'invalid option' error when setting the
partition endpoint to -0 (which tells parted to extend the partition
to the end of the disk). This change adds '--' to indicate the
remaining args are not options.

Fixes bug 1247307

Change-Id: I3bd2e25404d002329aa0ea53e9b60b69c90c0adb
Imported Translations from Transifex

Change-Id: I473e1dacce9c8fe58a6e3a29ea047980cbcd6967
Merge "Fixes the destroy() method for the Docker virt driver"
Merge "Imported Translations from Transifex"
Merge "Parted 'invalid option' in XenAPI driver"