Set a proper default for spam thresholds

admin/migrations/versions/a4accda8a8c7_.py

@@ -0,0 +1,25 @@
+""" Update the spam threshold default value
+
+Revision ID: a4accda8a8c7
+Revises: c5696b48442d
+Create Date: 2016-08-18 20:34:19.624603
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = 'a4accda8a8c7'
+down_revision = 'c5696b48442d'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    with op.batch_alter_table('user') as batch:
+        batch.drop_column('spam_threshold')
+        batch.add_column(sa.Column('spam_threshold', sa.Numeric(),
+                         default=10.0))
+
+
+def downgrade():
+    pass