Refactor API Schema and validation

- /schema now returns full openapi/swagger schema
- That schema is used to validate incoming requests
- And used as a contract in future integration tests
- Moved route files up one level
- Fixed incorrect 404 reponses when getting objects
- Fixed saving new objects and passing jsonschemavalidation

backend/schema/components/certificate-object.json

@@ -0,0 +1,66 @@
+{
+	"type": "object",
+	"description": "Certificate object",
+	"required": ["id", "created_on", "modified_on", "owner_user_id", "provider", "nice_name", "domain_names", "expires_on", "meta"],
+	"additionalProperties": false,
+	"properties": {
+		"id": {
+			"$ref": "../common.json#/definitions/id"
+		},
+		"created_on": {
+			"$ref": "../common.json#/definitions/created_on"
+		},
+		"modified_on": {
+			"$ref": "../common.json#/definitions/modified_on"
+		},
+		"owner_user_id": {
+			"$ref": "../common.json#/definitions/user_id"
+		},
+		"provider": {
+			"$ref": "../common.json#/definitions/ssl_provider"
+		},
+		"nice_name": {
+			"type": "string",
+			"description": "Nice Name for the custom certificate"
+		},
+		"domain_names": {
+			"$ref": "../common.json#/definitions/domain_names"
+		},
+		"expires_on": {
+			"description": "Date and time of expiration",
+			"format": "date-time",
+			"readOnly": true,
+			"type": "string"
+		},
+		"meta": {
+			"type": "object",
+			"additionalProperties": false,
+			"properties": {
+				"letsencrypt_email": {
+					"type": "string",
+					"format": "email"
+				},
+				"letsencrypt_agree": {
+					"type": "boolean"
+				},
+				"dns_challenge": {
+					"type": "boolean"
+				},
+				"dns_provider": {
+					"type": "string"
+				},
+				"dns_provider_credentials": {
+					"type": "string"
+				},
+				"propagation_seconds": {
+					"anyOf": [
+						{
+							"type": "integer",
+							"minimum": 0
+						}
+					]
+				}
+			}
+		}
+	}
+}