[Launch Instance Fix] New Launch Instance workflow needs validation

[Kelly Domico]

The new Launch Instance workflow needs to have the "Launch Instance" button disabled until all requirements met. Should have the following:

1. Instance name
2. Source selected
  - if creating volume: volume size > 0
  - if volume selected, volume size > max(volume image size, volume image root disk)
3. Instance count >= 1 (>1 allowed if image or instance snapshot source type selected)
4. Valid flavor
  - flavor RAM >= image minimum RAM
  - flavor root disk >= image minimum disk
5. Valid security group
6. Valid network if Neutron is enabled
7. Instance count * flavor RAM must not exceed quota
8. Instance count * flavor VCPUs must not exceed quota
9. Instance count must not exceed quota

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/165155

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/165155
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=65738d6878ad3c8c92db68af37908977b9e44448
Submitter: Jenkins
Branch: master

commit 65738d6878ad3c8c92db68af37908977b9e44448
Author: Kelly Domico <email address hidden>
Date: Mon Mar 16 20:53:57 2015 -0700

    [Launch Instance Fix] Adding validation

    Validations added to source, flavor, network, and access/security
    steps that will disable 'Launch Instance' button.

    Change-Id: I5f5b23e3a369b96a5fb8461ccaba0f6d0fdc37d5
    Closes-Bug: #1432867