Clarify deprecation of EXTRA_xxx_OPTS

The various EXTRA_xxx_OPTS variables will be removed in the Juno
development cycle, change the README to reflect the new way for
the Neutron variables.

Change-Id: Ic84da4a9b5a83e66cf0b57d643a87691f15517f0
fix failing wget statements under -o errexit in vmdk upload routine

Fix the case when uploaded image has no descriptor.
Refactored the code a bit

Tested:
1. monithic Sparse
2. monolithic flat
    2.1 flat file name mentioned in descriptor file
    2.1 flat file name not mentioned in descriptor file
3. descriptor header not found in the file
    3.1 image file name is *-flat, download descriptor
    3.2 image file name does not end with *-flat
4. file name contains all image properties

Change-Id: I0df9be5c2a1b9ed53cdb22d5cd40b94e56c48f37
Closes-bug: #1289664
Move libvirt install + setup to functions-libvirt

Moves installation and setup of libvirt to a common functions-libvirt,
which can be used by other drivers in the future that may require
cross-distro libvirt installation and config but are not using
VIRT_DRIVER=libvirt (ie, Ironic).

Change-Id: I4a9255c8b4bacd5acfde9b8061c9e537aeea592c
Rollback workaround for Marconi

This patch rollsback the stderr redirection in Marconi.

Change-Id: Iaa2d897295cf2bc2e4a8c370d3e0592def337c78
as is_heat_enabled

this is missing, and the code assumes "heat" to be in the
enabled services list otherwise.

Change-Id: Ib0a7db04d8e38b58aca48261308e7c4d1fd43972
Merge "fix failing wget statements under -o errexit in vmdk upload routine"
Integration testing preparation for Ironic

Add ability to create/register qemu vms for Ironic testing purposes

Implements bp:deprecate-baremetal-driver

Change-Id: If452438fcc0ff562531b33a36cd189b235654b48
Merge "Rollback workaround for Marconi"
Merge "Integration testing preparation for Ironic"
Merge "as is_heat_enabled"
Merge "Clarify deprecation of EXTRA_xxx_OPTS"
change the order of the print/flush

It seems that we get a different behavior whether stdout is closed
in the parent process or not when it comes to buffering. If it's
closed we don't get the last line flushed out to the file, if it's
not closed we do. This was seen in the trove pg fail.

A complete shot in the dark, but I'd like to see if this is fixed
with being explicit with printing to the log before stdout.

Change-Id: Ie37299dbc88d549d34d85731e571a5b7ef181311
Merge "Move libvirt install + setup to functions-libvirt"