Heat configuration param change for heat-api section
Heat configuration param change for heat-api section

Making variable name "works" to "workers" for correct configuration
as followed in other services

Closes-Bug: #1655081

Change-Id: I333b7a7a98770e640db49e8103900957c629bad5

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible