Remove SKIP_LOG_SETUP env variable from fluentd env
Remove SKIP_LOG_SETUP env variable from fluentd env

SKIP_LOG_SETUP variable was used by Heka stuff.
Heka has been removed from Kolla and Kolla-ansible.

Change-Id: I4448b26ace899eb888d34a12a85b019597e25435

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