Fix dummy API key in integration tests

Author: maksymmalyhin

FirebaseInstallations/Source/Tests/Integration/FIRInstallationsIntegrationTests.m

@@ -205,7 +205,7 @@ - (FIRApp *)createAndConfigureAppWithName:(NSString *)name {
   FIROptions *options =
       [[FIROptions alloc] initWithGoogleAppID:@"1:100000000000:ios:aaaaaaaaaaaaaaaaaaaaaaaa"
                                   GCMSenderID:@"valid_sender_id"];
-  options.APIKey = @"some_api_key";
+  options.APIKey = @"APIKeyWithValidFormat1920404502934lksfj";
   options.projectID = @"project_id";
   [FIRApp configureWithName:name options:options];