Fix race in catalyst tests

Summary:
Native code accesses the Java Application through the ApplicationHolder. The application should be set on the holder as soon as possible. This change fixes a race in WebWorkersTest.

public

Reviewed By: astreet

Differential Revision: D2905157

fb-gh-sync-id: 7e488f4eecefedb8482276776b3a66e14a843f90

ReactAndroid/src/androidTest/java/com/facebook/react/testing/ReactIntegrationTestCase.java

@@ -147,7 +147,6 @@ public void initializeWithInstance(CatalystInstance instance) {
     mBridgeIdleSignaler = new ReactBridgeIdleSignaler();
     mInstance.addBridgeIdleDebugListener(mBridgeIdleSignaler);
     getContext().initializeWithInstance(mInstance);
-    ApplicationHolder.setApplication((Application) getContext().getApplicationContext());
   }
 
   public boolean waitForBridgeIdle(long millis) {
@@ -165,6 +164,12 @@ public void waitForBridgeAndUIIdle() {
         IDLE_TIMEOUT_MS);
   }
 
+  @Override
+  protected void setUp() throws Exception {
+    super.setUp();
+    ApplicationHolder.setApplication((Application) getContext().getApplicationContext());
+  }
+
   @Override
   protected void tearDown() throws Exception {
     super.tearDown();