Open Stack

Hi,

I am trying to create initial db for the networking-mlnx project. 
I am following this neutron alembic documentation [1].
I added a entrypoint to networking-mlnx setup.cfg
neutron.db.alembic_migrations =
    networking-mlnx = networking_mlnx.db.migration:alembic_migrations
I added model.py file to networking-mlnx/networking_mlnx/db
And I run python setup.py develop to regenerate the entrypoint 

I am running the following commands:
1. mysql -e "drop database neutron; create database neutron;"
2. neutron-db-manage --subproject=neutron  upgrade heads
3. neutron-db-manage --subproject=networking-mlnx  revision -m "test" --autogenerate

I am getting the following errors:
INFO  [alembic.runtime.migration] Context impl MySQLImpl.                                                           
INFO  [alembic.runtime.migration] Will assume non-transactional DDL.                                                
INFO  [alembic.autogenerate.compare] Detected removed table u'alembic_version'                                      
INFO  [alembic.autogenerate.compare] Detected removed index 'idx_autoinc_vr_id' on 'ha_router_vrid_allocations'     
  Generating /.autodirect/mtrswgwork/moshele/openstack/networking-mlnx/networking_mlnx/db/migration/alembic_migrations/versions/120e7e350bb1_test.py ... done
  OK                                                                                                                                                         
Traceback (most recent call last):                                                                                                                           
  File "/usr/bin/neutron-db-manage", line 10, in <module>                                                                                                    
    sys.exit(main())                                                                                                                                         
  File "/.autodirect/mtrswgwork/moshele/openstack/neutron/neutron/db/migration/cli.py", line 689, in main                                                    
    return_val |= bool(CONF.command.func(config, CONF.command.name))                                                                                         
  File "/.autodirect/mtrswgwork/moshele/openstack/neutron/neutron/db/migration/cli.py", line 275, in do_revision                                             
    update_head_files(config)                                                                                                                                
  File "/.autodirect/mtrswgwork/moshele/openstack/neutron/neutron/db/migration/cli.py", line 398, in update_head_files                                       
    f.write(head_map[CONTRACT_BRANCH] + '\n')                                                                                                                
KeyError: 'contract'


And the migration script just dropping unrelated tables 

[moshele at r-dcs84 networking-mlnx]$ cat /.autodirect/mtrswgwork/moshele/openstack/networking-mlnx/networking_mlnx/db/migration/alembic_migrations/versions/120e7e350bb1_test.py
# revision identifiers, used by Alembic.
revision = '120e7e350bb1'
down_revision = None

from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import mysql

def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.drop_table('alembic_version')
    op.drop_index('idx_autoinc_vr_id', table_name='ha_router_vrid_allocations')
    ### end Alembic commands ###



It seem that the neutron alembic migration documentation [1] is out of date ( I don't see the --core_plugin flag in the neutron-db-manage man, but I do see the --subproject flag)

Does anyone know how to make it works? 


[1] - http://docs.openstack.org/developer/neutron/devref/alembic_migrations.html