Steps to reproduce in Fuel UI:
1. install misconfigured plugins to raise 500th response of GET /api/v1/releases/2/components (for example, "Plugin fuel_plugin_example_v4_hotpluggable is overlapping with fuel_plugin_example_v4 by introducing the same component with name "additional_service:service_plugin_v4_component")
2. open environment creation wizard in Fuel UI
Expected result: error pop-up appears instead of the wizard to show User GET /api/v1/releases/2/components response
Actual result: no error is shown, the first wizard step is rendered. User can enter an environment name. But User will get JS exception on Next button click and unavailability to continue environment creation without any explanation info.
Also, this issue requires changing GET /api/v1/releases/2/components response format to:
{"message": "Plugin fuel_plugin_example_v4_hotpluggable is overlapping with fuel_plugin_example_v4 by introducing the same component with name "additional_service:service_plugin_v4_component", "errors": []}
Fuel UI expects this format of Nailgun error response.
Fix proposed to branch: master
Review: https:/