Database changes to enable the new provider details table

- this will contain details as too which clients / notification types / priority etc for each delivery partner.

BREAKING CHANGE.

this pull request is ONLY the db changes. Everything is likely to break in the API until the code is updated.

migrations/versions/0012_complete_provider_details.py

@@ -0,0 +1,40 @@
+"""empty message
+
+Revision ID: 0012_complete_provider_details
+Revises: 0011_ad_provider_details
+Create Date: 2016-05-05 09:18:26.926275
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0012_complete_provider_details'
+down_revision = '0011_ad_provider_details'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+
+def upgrade():
+
+    op.alter_column('provider_rates', 'provider_id',
+               existing_type=postgresql.UUID(),
+               nullable=False)
+    op.drop_column('provider_rates', 'provider')
+    op.alter_column('provider_statistics', 'provider_id',
+               existing_type=postgresql.UUID(),
+               nullable=False)
+    op.drop_column('provider_statistics', 'provider')
+
+
+
+def downgrade():
+
+    op.add_column('provider_statistics', sa.Column('provider', postgresql.ENUM('mmg', 'twilio', 'firetext', 'ses', name='providers'), autoincrement=False, nullable=False))
+    op.alter_column('provider_statistics', 'provider_id',
+               existing_type=postgresql.UUID(),
+               nullable=True)
+    op.add_column('provider_rates', sa.Column('provider', postgresql.ENUM('mmg', 'twilio', 'firetext', 'ses', name='providers'), autoincrement=False, nullable=False))
+    op.alter_column('provider_rates', 'provider_id',
+               existing_type=postgresql.UUID(),
+               nullable=True)
+