should handle boolean string parameters through migrate_live API

[Ken'ichi Ohmichi]

If specifying false string ("False") as "block_migration" parameter of migrate_live API like the following, nova considers it as True.

$ curl -i 'http://10.21.42.81:8774/v2/[..]/servers/[..]/action' -X POST [..] -d '{"os-migrateLive": {"disk_over_commit": "False", "block_migration": "False", "host": "localhost"}}'

On the other hand, nova can consider false string as false in the case of "on_shared_storage" parameter of evacuate API.
That behavior seems API inconsistency.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/59934
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2e758452ddcb8871f7dbc6c859e3414923cd18bc
Submitter: Jenkins
Branch: master

commit 2e758452ddcb8871f7dbc6c859e3414923cd18bc
Author: Ken'ichi Ohmichi <email address hidden>
Date: Wed Dec 4 14:21:34 2013 +0900

    Add boolean convertors for migrate_live API

    migrate_live API contains "block_migration" and "disk_over_commit" as
    the parameters. They should be boolean.
    There are the other boolean parameters such as "on_shared_storage" of
    evacuate API, they can be passed with either boolean or string(e.g. "True").
    For API consistency, this patch adds boolean convertors to migrate_live
    API.

    Change-Id: Ic3040811977c834bfd4b0b4527795382e11227ed
    Closes-Bug: #1257661