Add a dynamic balancer filter (#367)

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Implemented CORS as a Wisdom filter
Made sure the CORS filter doesn't eagerly consider an OPTIONS query a CORS preflight request
Merge pull request #382 from Lambdacube/feature/corsfilter

Implemented CORS as a Wisdom filter
Refactor the Balance Filter and add an integration test (#367)

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Document the balance filter (#367)

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
When deploying the test bundle in blackbox test, we should wait for stability

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Explicitly ask to deploy the test bundle in the CORSTIT tests

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>
Add documentation to the CORS support (#367)

Signed-off-by: Clement Escoffier <clement.escoffier@gmail.com>