minor corrections to devref rpc page

Correct wording to proper English and remove extra space between words while
in there.

DocImpact

Change-Id: If4b3d9d81d7193107e84867e4ab713c413a4976d
Correct exception info format of v3 flavor manage

The existing flavor manage may raise HTTPBadRequest exception,
But the msg info didn't use '_' prefix. This patch adds it.

Change-Id: I736bf4b0e78ecc0bb753d376ee162f19fafc09e1
Remove XML namespace from some v3 extensions

The XML support was removed from the V3 API plugins,
this XML namespace was not used again.

Change-Id: I427597dd3f6d454037a791f911756a97f343966d
libvirt: Close opened file explicitly

Every opened file should be closed properly.

Change-Id: I5405638ba033f75957461c0ad33be9f0c6a17e3b
Remove bdms from run_instance RPC conductor call

After the move to build_and_run_instance in change
Iefab71047996b7cc08107794d5bc628c11680a70 we get the block device
mapping out from the DB on the conductor side. We need to do this since
there is not enough data in the RPC call from the API (we don't have DB
id's so compute can't use that data to update block devices in the boot
process).

Based on this - we should stop sending block devices to the conductor.

Change-Id: Ic7a5da3f0d58093c3b249025b9fcd36a1321f2b3
Initialize objects field in ObjectsListBase class

Normally the underlying value of an object attribute is set upon first
attempt to set it and would not exist otherwise. This causes the object
attribute access mechanism to fall back to obj_load_attr.

This is mostly fine for a lot of use cases, but it also means that for
ObjectListBase subclasses, it is not possible to construct them empty
and then call list methods on them without resorting to something like:

  myListObject(objects=[])

This patch makes ObjectListBase default it's objects filed to [] if it's
not passed in allowing us to have a cleaner API and call list methods
such as len() on objects constructed on the fly..

Change-Id: Iad1301cc4f88018f10f3dd6c76e35275cd0c51f6
Log cleanups for nova.virt.libvirt.volume

More log cleanups:
 - add log hints for error and warning levels

Change-Id: Idff1575208a1004350d89848059541502ee15e9a
Merge "Remove bdms from run_instance RPC conductor call"
Merge "Initialize objects field in ObjectsListBase class"
Merge "libvirt: Close opened file explicitly"
Merge "Remove XML namespace from some v3 extensions"
Merge "minor corrections to devref rpc page"
Merge "Log cleanups for nova.virt.libvirt.volume"
Merge "Correct exception info format of v3 flavor manage"