Automatically disable build triggers with successive failures or internal errors

We allow users to reenable them manually once disabled

data/migrations/versions/17aff2e1354e_add_automatic_disable_of_build_triggers.py

@@ -0,0 +1,45 @@
+"""Add automatic disable of build triggers
+
+Revision ID: 17aff2e1354e
+Revises: 61cadbacb9fc
+Create Date: 2017-10-18 15:58:03.971526
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '17aff2e1354e'
+down_revision = '61cadbacb9fc'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+def upgrade(tables):
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('repositorybuildtrigger', sa.Column('successive_failure_count', sa.Integer(), nullable=False))
+    op.add_column('repositorybuildtrigger', sa.Column('successive_internal_error_count', sa.Integer(), nullable=False))
+    # ### end Alembic commands ###
+
+    op.bulk_insert(
+        tables.disablereason,
+        [
+        {'id': 2, 'name': 'successive_build_failures'},
+        {'id': 3, 'name': 'successive_build_internal_errors'},
+        ],
+    )
+
+def downgrade(tables):
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('repositorybuildtrigger', 'successive_internal_error_count')
+    op.drop_column('repositorybuildtrigger', 'successive_failure_count')
+    # ### end Alembic commands ###
+
+    op.execute(tables
+                .disablereason
+                .delete()
+                .where(tables.disablereason.c.name == op.inline_literal('successive_internal_error_count')))
+
+    op.execute(tables
+                .disablereason
+                .delete()
+                .where(tables.disablereason.c.name == op.inline_literal('successive_failure_count')))