[FSSDK-12337] Fix experiment type values to match backend

Update EXPERIMENT_TYPES to use actual backend values:
'multi_armed_bandit' and 'contextual_multi_armed_bandit'
instead of shorthand 'mab' and 'cmab'. Restore accidentally
removed else branch in spec_params deep_clone.

Author: FarhanAnjum-opti

lib/optimizely/helpers/constants.rb

@@ -20,8 +20,8 @@ module Helpers
     module Constants
       EXPERIMENT_TYPES = {
         'ab' => 'a/b',
-        'mab' => 'mab',
-        'cmab' => 'cmab',
+        'mab' => 'multi_armed_bandit',
+        'cmab' => 'contextual_multi_armed_bandit',
         'td' => 'targeted_delivery',
         'fr' => 'feature_rollout'
       }.freeze

spec/spec_params.rb

@@ -2062,6 +2062,8 @@ def self.deep_clone(obj)
         new_obj.map! do |val|
           deep_clone(val)
         end
+      else
+        new_obj
       end
     end
   end