sqlalchemy-db: missing name for ENUM

Command "rally-manage db recreate" gives the following error:

TRACE rally   File "/usr/lib64/python2.7/site-packages/sqlalchemy/dialects/postgresql/base.py", line 898, in format_type
TRACE rally     raise exc.CompileError("Postgresql ENUM type requires a name.")
TRACE rally CompileError: Postgresql ENUM type requires a name.

Signed-off-by: Vu Tran <vu.tran@windriver.com>

diff --git a/rally/db/sqlalchemy/models.py b/rally/db/sqlalchemy/models.py
index c68e345..5b2dbc0 100644
--- a/rally/db/sqlalchemy/models.py
+++ b/rally/db/sqlalchemy/models.py
@@ -85,8 +85,8 @@ class Deployment(BASE, RallyBase):
     )
 
     status = sa.Column(
-        sa.Enum(*consts.DeployStatus),
-        name='enum_deployments_status',
+        sa.Enum(*consts.DeployStatus,
+        name='enum_deployments_status'),
         default=consts.DeployStatus.DEPLOY_INIT,
         nullable=False,
     )