fix(abtests) traffic percentage min and max + add migratedAbTestID to get/list responses

Author: Niamsy

specs/abtesting-v3/common/parameters.yml

@@ -56,8 +56,8 @@ description:
 trafficPercentage:
   type: integer
   description: Percentage of search requests each variant receives.
-  minimum: 0
-  maximum: 100
+  minimum: 1
+  maximum: 99
   example: 60
 
 currencies:

specs/abtesting-v3/common/schemas/ABTest.yml

@@ -27,6 +27,8 @@ ABTest:
       $ref: "Variant.yml#/variants"
     configuration:
       $ref: "#/ABTestConfiguration"
+    migratedAbTestID:
+      $ref: "#/MigratedABTestId"
   required:
     - status
     - name
@@ -107,3 +109,8 @@ EffectMetric:
     - clickThroughRate
     - conversionRate
     - purchaseRate
+
+MigratedABTestId:
+  type: integer
+  description: Unique migrated A/B test identifier.
+  example: 224