Put neutron provider commands in neutron.rb

This allows to gain access to all neutron commands using composability,
see[1] for an example.  It removes some redundancy as well.  Finally, it
looks more like the openstacklib/**/openstack.rb provider code.

[1] https://review.openstack.org/#/c/347468/

Change-Id: Iad0354f5babd86822e37053f3f7a1134803fd4f8

lib/puppet/provider/neutron.rb

@@ -3,6 +3,9 @@ require 'puppet/util/inifile'
 
 class Puppet::Provider::Neutron < Puppet::Provider
 
+  initvars
+  commands :neutron => 'neutron'
+
   def self.conf_filename
     '/etc/neutron/neutron.conf'
   end

lib/puppet/provider/neutron_network/neutron.rb

@@ -11,8 +11,6 @@ Puppet::Type.type(:neutron_network).provide(
     Assumes that the neutron service is configured on the same host.
   EOT
 
-  commands :neutron => 'neutron'
-
   mk_resource_methods
 
   def self.neutron_type

lib/puppet/provider/neutron_port/neutron.rb

@@ -12,8 +12,6 @@ Puppet::Type.type(:neutron_port).provide(
   EOT
   #TODO No security group support
 
-  commands :neutron => "neutron"
-
   mk_resource_methods
 
   def self.instances

lib/puppet/provider/neutron_router/neutron.rb

@@ -11,8 +11,6 @@ Puppet::Type.type(:neutron_router).provide(
     Assumes that the neutron service is configured on the same host.
   EOT
 
-  commands :neutron => 'neutron'
-
   mk_resource_methods
 
   def self.do_not_manage

lib/puppet/provider/neutron_router_interface/neutron.rb

@@ -17,8 +17,6 @@ Puppet::Type.type(:neutron_router_interface).provide(
 
   EOT
 
-  commands :neutron => 'neutron'
-
   mk_resource_methods
 
   def self.instances

lib/puppet/provider/neutron_subnet/neutron.rb

@@ -12,8 +12,6 @@ Puppet::Type.type(:neutron_subnet).provide(
     Assumes that the neutron service is configured on the same host.
   EOT
 
-  commands :neutron => 'neutron'
-
   mk_resource_methods
 
   def self.neutron_type