alembic: Add bundle column in ps_endpoints table

The ps_endpoints table was missing the bundle column
introduced with the bundle feature in
commit 065c3005.

ASTERISK-27374 #close

Change-Id: Ic900f4f2c20f64b99ea898d50f5c0a7117472d46

contrib/ast-db-manage/config/versions/de83fac997e2_add_bundle_to_ps_endpoints.py

+"""add bundle to ps_endpoints
+
+Revision ID: de83fac997e2
+Revises: 20abce6d1e3c
+Create Date: 2017-10-24 17:10:57.242020
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'de83fac997e2'
+down_revision = '20abce6d1e3c'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import ENUM
+
+YESNO_NAME = 'yesno_values'
+YESNO_VALUES = ['yes', 'no']
+
+def upgrade():
+     ############################# Enums ##############################
+
+    # yesno_values have already been created, so use postgres enum object
+    # type to get around "already created" issue - works okay with mysql
+    yesno_values = ENUM(*YESNO_VALUES, name=YESNO_NAME, create_type=False)
+
+    op.add_column('ps_endpoints', sa.Column('bundle', yesno_values))
+
+def downgrade():
+    context = op.get_context()
+
+    if context.bind.dialect.name == 'mssql':
+        op.drop_constraint('ck_ps_endpoints_bundle_yesno_values', 'ps_endpoints')
+    op.drop_column('ps_endpoints', 'bundle')