Modify integration test focus for Windows

Remove ntfs keyword from test focus so that more tests will be triggered
(snapshottable)

Author: jingxu97

test/run-windows-k8s-integration.sh

@@ -23,7 +23,7 @@ base_cmd="${PKGDIR}/bin/k8s-integration-test \
             --platform=windows --bringup-cluster=false --teardown-cluster=false --teardown-driver=${teardown_driver}\
             --run-in-prow=true --deploy-overlay-name=${overlay_name} --service-account-file=${E2E_GOOGLE_APPLICATION_CREDENTIALS} \
             --do-driver-build=${do_driver_build} --gce-zone=${gce_zone} --test-version=${test_version}\
-            --storageclass-files=sc-windows.yaml --snapshotclass-file=pd-volumesnapshotclass.yaml --test-focus='External.Storage.*ntfs' \
+            --storageclass-files=sc-windows.yaml --snapshotclass-file=pd-volumesnapshotclass.yaml --test-focus='External.Storage' \
             --deployment-strategy=${deployment_strategy}"
 
 eval "$base_cmd"