First version of ceilometer for Hyper-V

This is the first version of the ceilometer module for Hyper-V, it extracts the structure from stackforge/puppet-ceilometer.

It assumes the installation of some dependencies from `nova_hyper_v`. I want also to create a python module called `ceilometer-common-hyperv`, `ceilometer-agent-compute` to delegate functionality and provide better integration with main stackforge module (now the installation is based on the git repo and a given branch/tag).

Good documentation is pending, basic usage:
```
  ###################################
  # Ceilometer configuration
  class { 'ceilometer_hyper_v':
    metering_secret     => $ceilometer_metering_secret,
    rabbit_host         => undef,
    rabbit_port         => 5672,
    rabbit_hosts        => $rabbit_hosts,
    rabbit_userid       => $rabbit_user,
    rabbit_password     => $rabbit_password,
    rabbit_virtual_host => $rabbit_virtual_host,
    verbose             => $verbose,
    debug               => $debug,
  }

  class { 'ceilometer_hyper_v::agent::auth':
    auth_url         => $ceilometer_auth_url,
    auth_user        => $ceilometer_user,
    auth_password    => $ceilometer_password,
    auth_tenant_name => $ceilometer_tenant,
    auth_cacert      => $ceilometer_cacert,
  }

  class { 'ceilometer_hyper_v::agent::compute':
    enabled          => $ceilometer_enabled,
  }
```