Migrate existing platform admin services to not be counted

If a service has been created by someone on our team, it’s probably a
test service, which shouldn’t be included in the count of live services.

This commit adds a migration to do this for existing services.

migrations/versions/0283_platform_admin_not_live.py

@@ -0,0 +1,35 @@
+"""empty message
+
+Revision ID: 0283_platform_admin_not_live
+Revises: 0282_add_count_as_live
+Create Date: 2016-10-25 17:37:27.660723
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0283_platform_admin_not_live'
+down_revision = '0282_add_count_as_live'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+STATEMENT = """
+    UPDATE
+        services
+    SET
+        count_as_live = {count_as_live}
+    FROM
+        users
+    WHERE
+        services.created_by_id = users.id and
+        users.platform_admin is true
+    ;
+"""
+
+
+def upgrade():
+    op.execute(STATEMENT.format(count_as_live='false'))
+
+def downgrade():
+    op.execute(STATEMENT.format(count_as_live='true'))