Add World Index to GraphQL A/B test

This was missed in a3a52ac.

Author: brucebolt

dictionaries.yaml

@@ -4,13 +4,15 @@ active_ab_tests:
   GraphQLMinistersIndex: true
   GraphQLNewsArticles: true
   GraphQLRoles: true
+  GraphQLWorldIndex: true
   SearchFreshnessBoost: true
 ab_test_expiries:
   Example: 86400
   BankHolidaysTest: 86400
   GraphQLMinistersIndex: 86400
   GraphQLNewsArticles: 86400
   GraphQLRoles: 86400
+  GraphQLWorldIndex: 86400
   SearchFreshnessBoost: 86400
 # AB test percentages
 example_percentages:
@@ -31,6 +33,10 @@ graphqlroles_percentages:
   A: 0
   B: 0
   Z: 100
+graphqlworldindex_percentages:
+  A: 0
+  B: 0
+  Z: 100
 searchfreshnessboost_percentages:
   A: 50
   B: 50

www/ab_tests.yaml

@@ -19,6 +19,10 @@
   - A
   - B
   - Z
+- GraphQLWorldIndex:
+  - A
+  - B
+  - Z
 - SearchFreshnessBoost:
   - A
   - B