Rename files to preserve history

Change-Id: If6248f21f5a29db7c906c6f7cd11ee8960002d18

polygerrit-ui/app/services/gr-auth/gr-auth_impl.ts

diff --git a/polygerrit-ui/app/services/gr-auth.js b/polygerrit-ui/app/services/gr-auth/gr-auth_impl.ts
similarity index 100%
rename from polygerrit-ui/app/services/gr-auth.js
rename to polygerrit-ui/app/services/gr-auth/gr-auth_impl.ts

polygerrit-ui/app/services/gr-auth/gr-auth_test.js

diff --git a/polygerrit-ui/app/services/gr-auth_test.js b/polygerrit-ui/app/services/gr-auth/gr-auth_test.js
similarity index 100%
rename from polygerrit-ui/app/services/gr-auth_test.js
rename to polygerrit-ui/app/services/gr-auth/gr-auth_test.js