Fix decideAll method

Author: yavorona

packages/optimizely-sdk/lib/optimizely_user_context/index.tests.js

@@ -233,10 +233,8 @@ describe('lib/optimizely_user_context', function() {
             reasons: [],
           },
         };
-        var fakeDecideForKeys = sinon.stub().returns(fakeDecisionMap);
         fakeOptimizely = {
-          decideAll: sinon.stub().call(fakeDecideForKeys),
-          decideForKeys: fakeDecideForKeys
+          decideAll: sinon.stub().returns(fakeDecisionMap)
         };
         var user = new OptimizelyUserContext({
           optimizely: fakeOptimizely,

packages/optimizely-sdk/lib/optimizely_user_context/index.ts

@@ -97,6 +97,6 @@ export default class OptimizelyUserContext {
     options: OptimizelyDecideOptions[] = []
   ): { [key: string]: OptimizelyDecision } {
 
-    return this.optimizely.decideForKeys(this, options);
+    return this.optimizely.decideAll(this, options);
   }
 }