supported OpenStack Quantum Router Operation. not include mock code.
added mock code for router operation.
fixed responce data from mock and removed vanilla options reject code.
[openstack|network] create_network provider extensions

Implements provider extensions when creating networks.

See:

http://docs.openstack.org/trunk/openstack-network/admin/content/provider_attributes.html

Complements #1581 (Added missing Network model attributes)
[openstack|network] Added missing router model/collection
[openstack|network] update_router request updates

- Filter out invalid options
- Add support for additional options:
  * name
  * admin_state_up
- external_gateway_info can be either a Hash or a
  Fog::Network::OpenStack::Network (see docs)
- Added documentation
[openstack|network] router model updates

- Added missing attributes
- Added documentation
[openstack|network] create_router request updates

- Filter out invalid options
[openstack|network] Added missing router related tests
@rubiojr wrote mock code for openstack routers.
@rubiojr fixed mock test failure.
@rubiojr fixed mock faulure for router(s)_tests.rb
[openstack|network] create_network provider extensions reworked

- Differenciate provider and vanilla options
- Fixed mocks
[openstack|network] remove extra trailing comma
[openstack|compute] Allow booting a VM with NICs (net_id, port_id, fixed_ip)
[openstack|compute] Use attribute accessor for nics
fix bug where servers.all was ignoring filters due to hash merging in the wrong direction.
[libvirt|compute] handle missing <system> tag in libvirt node info

Fixes #1652: libvirt provider requires a field that libvirt specifies as
optional
Merge pull request #1676 from domcleal/1652-missing-systeminfo

[libvirt|compute] handle missing <system> tag in libvirt node info
Merge pull request #1673 from aussielunix/Bug-servers-all-filter

[vsphere] fix bug where servers.all was ignoring filters due to hash merging in the wrong direction