Add LiveTemplates for read_config variations
Add LiveTemplates for read_config variations

Summary:
Add a LiveTemplate expansions for both the two-arg and
three-arg forms of `read_config`.

Reviewed By: IanChilds

fbshipit-source-id: ac2da0c56c

zpao/buck,zpao/buck,SeleniumHQ/buck,Addepar/buck,zpao/buck,rmaz/buck,rmaz/buck,rmaz/buck,romanoid/buck,SeleniumHQ/buck,nguyentruongtho/buck,zpao/buck,SeleniumHQ/buck,kageiit/buck,JoelMarcey/buck,facebook/buck,rmaz/buck,rmaz/buck,SeleniumHQ/buck,romanoid/buck,Addepar/buck,SeleniumHQ/buck,kageiit/buck,JoelMarcey/buck,rmaz/buck,romanoid/buck,kageiit/buck,zpao/buck,JoelMarcey/buck,facebook/buck,nguyentruongtho/buck,JoelMarcey/buck,romanoid/buck,kageiit/buck,SeleniumHQ/buck,Addepar/buck,nguyentruongtho/buck,nguyentruongtho/buck,rmaz/buck,Addepar/buck,Addepar/buck,Addepar/buck,romanoid/buck,facebook/buck,JoelMarcey/buck,romanoid/buck,SeleniumHQ/buck,romanoid/buck,kageiit/buck,SeleniumHQ/buck,romanoid/buck,Addepar/buck,rmaz/buck,SeleniumHQ/buck,zpao/buck,SeleniumHQ/buck,Addepar/buck,JoelMarcey/buck,Addepar/buck,JoelMarcey/buck,rmaz/buck,romanoid/buck,romanoid/buck,Addepar/buck,nguyentruongtho/buck,SeleniumHQ/buck,rmaz/buck,rmaz/buck,facebook/buck,rmaz/buck,nguyentruongtho/buck,JoelMarcey/buck,romanoid/buck,facebook/buck,facebook/buck,zpao/buck,facebook/buck,JoelMarcey/buck,JoelMarcey/buck,kageiit/buck,SeleniumHQ/buck,JoelMarcey/buck,romanoid/buck,SeleniumHQ/buck,nguyentruongtho/buck,rmaz/buck,Addepar/buck,Addepar/buck,kageiit/buck,romanoid/buck,JoelMarcey/buck,JoelMarcey/buck,Addepar/buck