Nicira integration bugfixes:

  Changed neutron_settings[nicira][enabled] to neutron_settings[nicira][nicira]

  - l23network/lib/puppet/provider/l2_ovs_nicira/ovs.rb:
    - file path variables moved to methods
    - commands syntax
    - replaced :name with :display_name
    - bridge ip parsing
    - connector type mapping
  - neutron/lib/puppet/provider/neutron_plugin_nicira/ini_setting.rb
    - fixed typo in provider's name
  - neutron/manifests/agents/dhcp.pp
    - dhcp service requirements fix
  - neutron/manifests/network/predefined_netwoks.pp
    - additional anchor for nicira
  - neutron/manifests/plugins/nicira.pp
    - added integration bridge name to class params
    - added custom nicira packages
  - openstack/manifests/compute.pp, openstack/manifests/neutron_router.pp
    - neutron plugin fix
    - bridge ip address for nicira fix

Change-Id: If503b714d46ec0f6479d6cdb33182b64c1bfc4e2