fix(api): merge pipeline parameter and default value in workflow context

[bnjjj]

Signed-off-by: Benjamin Coenen benjamin.coenen@corp.ovh.com

1. Description
2. Related issues
   close pipeline parameter and default value #3380
3. About tests
4. Mentions

@ovh/cds

[yesnault]

it's not really a src / dst, overwritter?

[ovh-cds]

CDS Report ut-engine#6398.0 ✘

• Stage 1

  • Engine Test with DB ✘
    Unit Tests Report

• github.com/ovh/cds/cli

• github.com/ovh/cds/engine/api

  • Test_postAndDeleteWorkflowLabelHandler ✘

• github.com/ovh/cds/engine/api/application

• github.com/ovh/cds/engine/api/environment

• github.com/ovh/cds/engine/api/keys

• github.com/ovh/cds/engine/api/migrate

• github.com/ovh/cds/engine/api/pipeline

• github.com/ovh/cds/engine/api/plugin

• github.com/ovh/cds/engine/api/project

• github.com/ovh/cds/engine/api/secret

• github.com/ovh/cds/engine/api/user

• github.com/ovh/cds/engine/api/warning

• github.com/ovh/cds/engine/api/worker

• github.com/ovh/cds/engine/api/workflow

• github.com/ovh/cds/engine/hatchery/swarm

• github.com/ovh/cds/engine/hooks

• github.com/ovh/cds/engine/repositories

• github.com/ovh/cds/engine/vcs

• github.com/ovh/cds/engine/vcs/bitbucket

• github.com/ovh/cds/engine/vcs/github

• github.com/ovh/cds/engine/vcs/gitlab

• github.com/ovh/cds/engine/worker

• github.com/ovh/cds/sdk

• github.com/ovh/cds/sdk/cdsclient

• github.com/ovh/cds/sdk/exportentities

• github.com/ovh/cds/sdk/interpolate

• github.com/ovh/cds/sdk/luascript

• github.com/ovh/cds/sdk/namesgenerator

• github.com/ovh/cds/sdk/vcs/git