Check if reboot request type is None

If the reboot request type is None, raise HTTPBadRequest like if the
argument was missing.

Change-Id: I75b1791b7a6c9304c3a78e869fe63d72302fc9d8
Closes-Bug: #1247735
fakevirt: return hypervisor_version as an int instead of a string

The compute_nodes.hypervisor_version type in the database is an integer
not a string. This is only caught in postgres and not MySQL. Changing
the fakevirt driver to return the proper type allows for the
test_virt_drivers test to make check this for all drivers it currently
tests.

Change-Id: I25e4dba855b954a2451bced9a53172b51eb47238
Sync rpc fix from oslo-incubator

Sync the following fixes from oslo-incubator:

ef406a2 Create a shared queue for QPID topic consumers
e227c0e Properly reconnect subscribing clients when QPID broker restarts

Closes-bug: #1251757
Closes-bug: #1257293

Change-Id: I917c7a6e5cb64c6383e74d0fb6e095ad17d4d478
Merge "fakevirt: return hypervisor_version as an int instead of a string"
Merge "Sync rpc fix from oslo-incubator"
Merge "Check if reboot request type is None"
XenAPI: Speedup host_ref cannot change - get it once

The host we run on is fixed - getting this each time from XAPI
is expensive

Change-Id: Ifee9a778f3ed855ef52b001de3fc2ebbd0b972cf
XenAPI: get_info was very expensive

Getting the whole VM record is expensive and slowed down Tempest tests
significantly.  Replaced with getting each required item.

When getting power state, only need that specific value, so reduce the
calls to get_info too.

Change-Id: I93bcef5b692a531aac41518dc29d5d4f46cded65
XenAPI: Tidy calls to get_all_ref_and_rec

get_all_records is more efficient than getting them individually in the
old get_all_ref_and_rec implementation.

Replaced some cases of get_all_records with a faster and more
specific API call.

Change-Id: I4725c3f1fdebdf1737941cb7db69b19afb22df9f
XenAPI: Speedup get_vhd_parent_uuid

In many cases the VDI record has already been retrieved.
Use it rather than expensively getting a new VDI record from XAPI.

Change-Id: I469e2a415c1f1924010f47d3927ca18c45a7b8f8
XenAPI: Use get_VALUE in preference to get_record()['VALUE']

Replaces calls to get_record where only a single item is retrieved
from the record with the specific get_VALUE call.

Change-Id: I52e20c4f4c9d6a6ad019694916ee057cc96b18a6
XenAPI: Synchronize on all VBD plug/unplug per VM

Dynamically adding or removing a device needs to be synchronized
to work around a bug in XenServer 6.1 and 6.2 where simultaneous
events can be partially ignored, leading to a failure to plug or
unplug.

Change I041365ed863a1a1c55e88025dff42d01c35494a2 attempted to
work around the issue by retrying - however that does not catch
all failures.  This change should eliminate some of the known
INTERNAL_ERROR failures, but not all, so I041 should not be
reverted.

Change Ie7a64c481a9e3874df9d5924fbb050ac7ab117db does the same
as this, but only for VBD.plug.

Change-Id: If78d4e5f1dd84f1d4a588f25b8f887a7b125bbea
Closes-bug: 1217972
XenAPI: Monitor the GC when coalescing

Add a new host plugin to monitor whether the garbage collector is running.
This is then used by the wait_for_vhd_coalesce function to know whether
waiting any more is likely to produce the expected results.

Increased the number of times we loop waiting for coalesce as the loop
now has knowledge that something is still happening.

Change-Id: Idcc0738945bd1aee8cdb52c9cfabd798f85c31db
Closes-bug: 1258169

Conflicts:

	etc/nova/nova.conf.sample
	nova/virt/xenapi/vm_utils.py