Fix root disk not be detached after deleting lxc container

Add teardown_container action when cleanup lxc instance to make
sure root disk be detached and no resource leak.

Fixes: bug #1208387
       bug #1203927

Change-Id: I063fd3a9856bba089bcde5cdefd2576e2eb2b0e9
Fixes Hyper-V issue with VHD file format

The VHD format cookie signature needs to be checked in the footer
instead of the header as fixed format VHDs don't have a copy of the
footer at the beginning of the file.

Fixes bug: #1233853

Change-Id: Ibe44f0d895cde2edbc03dcd6ecebac24b0936660
libvirt: add missing i18n support

There were some log messages that did not support the i18n
format.

Change-Id: Id75de9fb7be2924b431562b6bd527ede399c3d37
Closes-Bug: #1240022
Merge "Fixes Hyper-V issue with VHD file format"
Merge "Fix root disk not be detached after deleting lxc container"
Merge "libvirt: add missing i18n support"