Remove 3 unnecessary variables in scheduler

Remove 3 lines which is unnecessary because already set its value

Change-Id: I8ba107963b8798e15b6336dbe355f86d2ef505f8
Correct the keypairs-get-resp.json API sample file

Current keypair sample files 'keypairs-get-resp.json/xml contain
'keypairs' as the first key and that means its sample response
of "list keypairs" API not "get keypair" API.

The tests don't pass a keypair id, so current tests also are for
"list keypairs" API.

Details-
Below API sample files- from their name it looks like these are for
get keypair API. But in actual content of these files are written as
List keypair API response. So it create the confusion that for which
API these API sample file are. Name suggest for GET and content
suggest for LIST Keypair.

    /nova/tests/integrated/api_samples/os-keypairs/
    keypairs-get-resp.json.tpl
    /nova/tests/integrated/api_samples/os-keypairs/
    keypairs-get-resp.xml.tpl

Their API sample test cases are written corrosponding to list keypair
APIs.

This patch correct the above API sample file name from get to list
Keypair APIs.
API Sample test cases names are also modified accordingly.

Partial-Bug: 1298769

Change-Id: I88d894ff9b0f6236221fa922601b641f26a87301
Drop nova-rpc-zmq-receiver man-page

Doesn't make sense to install and build docs after it was removed.

Change-Id: Ia6193808cca625e83cb3497b5033db5c08dcdd1e
libvirt: pause mode is not supported by all drivers

Only KVM/Qemu drivers support the VIR_DOMAIN_START_PAUSED flag
Booting guests on other drivers with the above flag will make it fail.

Closes-Bug: 1301453
Change-Id: Ia98e018b686c4ec3c15fd1f6bcc78188f330fcef
Merge "Drop nova-rpc-zmq-receiver man-page"
Merge "Remove 3 unnecessary variables in scheduler"
Merge "Correct the keypairs-get-resp.json API sample file"