Changes

=== stable env:===* web app: https://fmd.stage.mozaws.net/* b2g-FTU-fxa: must setpush gecko pref: user_pref("identity.fxaccounts.auth.uri", "https://api-accounts.stage.mozaws.net/v1");* b2g-fmd-fxa-oauth: https://oauth.stage.mozaws.net/v1(b2g default)* b2g-fmd: https://fmd.stage.mozaws.net(b2g default)

=== stage env:=== * web app: https://find.stage.mozaws.net* b2g-FTU-fxa: https://accounts.firefox.com/v1 (b2g default)Must Flash Gaia: - https://github.com/mozilla-b2g/gaia/blob/master/customization/findmydevice.json* b2g-fmd-fxa-oauth: https://oauth.accounts.firefox.com/v1* b2g-fmd: https://find.stage.mozaws.net

=== prod env:===* web app: https://find.firefox.com (ToBeDeployed)* b2g-FTU-fxa: https://accounts.firefox.com/v1 (b2g default)Must Flash Gaia: - https://github.com/mozilla-b2g/gaia/blob/master/customization/findmydevice.json* b2g-fmd-fxa-oauth: https://oauth.accounts.firefox.com/v1* b2g-fmd: https://find.firefox.com (ToBeDeployed)