Added PayPal to the list of companies using Aurora
Added PayPal to the list of companies using Aurora

Reviewed at https://reviews.apache.org/r/60787/

rdelval/aurora,medallia/aurora,apache/aurora,medallia/aurora,crashlytics/aurora,apache/aurora,rdelval/aurora,apache/aurora,apache/aurora,thinker0/aurora,apache/aurora,rdelval/aurora,thinker0/aurora,crashlytics/aurora,rdelval/aurora,thinker0/aurora,medallia/aurora,thinker0/aurora,medallia/aurora,crashlytics/aurora,medallia/aurora,medallia/aurora,thinker0/aurora,thinker0/aurora,crashlytics/aurora,crashlytics/aurora,crashlytics/aurora,apache/aurora,rdelval/aurora,rdelval/aurora