refactor: Drop meaningless 'api' attribute from NeutronCommand class

'api' attribute in NeutronCommand class was required by
OpenStackCommand class. It is now meaningless.

Partial-Bug: #1532258
Change-Id: I7fa24cc1011e5ee0ce1c8956edae785cfb4b9408

neutronclient/neutron/v2_0/__init__.py

@@ -384,9 +384,6 @@ class NeutronCommandMeta(abc.ABCMeta):
 @six.add_metaclass(NeutronCommandMeta)
 class NeutronCommand(command.Command):
 
-    # TODO(amotoki): Get rid of 'api' attribute. There is no such convention
-    # in OpenStack client. It may be an ancient convention though.
-    api = 'network'
     values_specs = []
     json_indent = None
     resource = None
@@ -456,7 +453,6 @@ class NeutronCommand(command.Command):
 class CreateCommand(NeutronCommand, show.ShowOne):
     """Create a resource for a given tenant."""
 
-    api = 'network'
     log = None
 
     def get_parser(self, prog_name):
@@ -498,7 +494,6 @@ class CreateCommand(NeutronCommand, show.ShowOne):
 class UpdateCommand(NeutronCommand):
     """Update resource's information."""
 
-    api = 'network'
     log = None
     allow_names = True
 
@@ -553,7 +548,6 @@ class UpdateCommand(NeutronCommand):
 class DeleteCommand(NeutronCommand):
     """Delete a given resource."""
 
-    api = 'network'
     log = None
     allow_names = True
 
@@ -599,7 +593,6 @@ class DeleteCommand(NeutronCommand):
 class ListCommand(NeutronCommand, lister.Lister):
     """List resources that belong to a given tenant."""
 
-    api = 'network'
     log = None
     _formatters = {}
     list_columns = []
@@ -705,7 +698,6 @@ class ListCommand(NeutronCommand, lister.Lister):
 class ShowCommand(NeutronCommand, show.ShowOne):
     """Show information of a given resource."""
 
-    api = 'network'
     log = None
     allow_names = True
 

neutronclient/neutron/v2_0/floatingip.py

@@ -90,7 +90,6 @@ class DeleteFloatingIP(neutronV20.DeleteCommand):
 class AssociateFloatingIP(neutronV20.NeutronCommand):
     """Create a mapping between a floating IP and a fixed IP."""
 
-    api = 'network'
     resource = 'floatingip'
 
     def get_parser(self, prog_name):
@@ -126,7 +125,6 @@ class AssociateFloatingIP(neutronV20.NeutronCommand):
 class DisassociateFloatingIP(neutronV20.NeutronCommand):
     """Remove a mapping from a floating IP to a fixed IP."""
 
-    api = 'network'
     resource = 'floatingip'
 
     def get_parser(self, prog_name):

neutronclient/neutron/v2_0/quota.py

@@ -37,7 +37,6 @@ def get_tenant_id(args, client):
 class DeleteQuota(neutronV20.NeutronCommand):
     """Delete defined quotas of a given tenant."""
 
-    api = 'network'
     resource = 'quota'
 
     def get_parser(self, prog_name):
@@ -70,7 +69,6 @@ class DeleteQuota(neutronV20.NeutronCommand):
 class ListQuota(neutronV20.NeutronCommand, lister.Lister):
     """List quotas of all tenants who have non-default quota values."""
 
-    api = 'network'
     resource = 'quota'
 
     def get_parser(self, prog_name):
@@ -98,7 +96,6 @@ class ShowQuota(neutronV20.NeutronCommand, show.ShowOne):
     """Show quotas of a given tenant.
 
     """
-    api = 'network'
     resource = "quota"
 
     def get_parser(self, prog_name):

neutronclient/neutron/v2_0/router.py

@@ -138,7 +138,6 @@ class UpdateRouter(neutronV20.UpdateCommand):
 class RouterInterfaceCommand(neutronV20.NeutronCommand):
     """Based class to Add/Remove router interface."""
 
-    api = 'network'
     resource = 'router'
 
     def call_api(self, neutron_client, router_id, body):
@@ -211,7 +210,6 @@ class RemoveInterfaceRouter(RouterInterfaceCommand):
 class SetGatewayRouter(neutronV20.NeutronCommand):
     """Set the external network gateway for a router."""
 
-    api = 'network'
     resource = 'router'
 
     def get_parser(self, prog_name):
@@ -264,7 +262,6 @@ class SetGatewayRouter(neutronV20.NeutronCommand):
 class RemoveGatewayRouter(neutronV20.NeutronCommand):
     """Remove an external network gateway from a router."""
 
-    api = 'network'
     resource = 'router'
 
     def get_parser(self, prog_name):