CLI encrypt tool doesn't work when project is not in us-east-1

[GeneralistDev]

If you try and run sls crypt encrypt -v and the Serverless framework project is set to us-west-1 for example you get the following output.

Serverless Error ---------------------------------------
 
  Invalid arn
 
  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Forums:        forum.serverless.com
     Chat:          gitter.im/serverless/serverless
 
  Your Environment Information -----------------------------
     OS:                     darwin
     Node Version:           6.10.3
     Serverless Version:     1.20.0