Improve rule for creating leadas
Improve rule for creating leadas

The first callback don't send the context  as a parameter. This can break rules workflow.

Also the rule was refactored to the following: 
  * Make a fast call to the rule's callback so it won't  block waiting salesforce's to respond
  * Added a few error checks to match Salesforce's API
  * Moved API Keys and sensible data to configuration variables
auth0/rules,auth0/rules,auth0/rules