[feature] transformations plugin

[subnetmarco]

This is the request transformation plugin, work in progress. #117

[coveralls]

Coverage decreased (-1.82%) to 65.88% when pulling 88e1e96 on feature/transformations-plugin into 2212535 on master.

[coveralls]

Coverage decreased (-1.82%) to 65.88% when pulling 88e1e96 on feature/transformations-plugin into 2212535 on master.

[subnetmarco]

@thibaultcha this is ready, not really happy with the schema though. To add the plugin, execute a request like:

curl -d "name=request_transformer&api_id=ID&value.add.querystring=paramname:value&value.remove.form=param1, param2" 127.0.0.1:8001/plugins_configurations/

The reason why the param names and values are in the name:value format, is because with the current schema design there is no other way around but we have to use a separator, which in this case is :.

[coveralls]

Coverage decreased (-1.82%) to 65.88% when pulling 16f4f4f on feature/transformations-plugin into ab69baa on master.

[coveralls]

Changes Unknown when pulling 567b097 on feature/transformations-plugin into * on master*.

[coveralls]

Coverage decreased (-1.61%) to 65.91% when pulling b246b6d on feature/transformations-plugin into 2e3814d on master.

[subnetmarco]

Merged and squashed with 1388516