Description of problem:
Rebooted a compute node and saw the following error:
Jul  2 08:56:40 compute-0 cloud-init[1943]: 2019-07-02 08:56:40,913 - util.py[WARNING]: failed stage init                                                             
Jul  2 08:56:40 compute-0 cloud-init[1943]: failed run of stage init                                                                                                  
Jul  2 08:56:40 compute-0 cloud-init[1943]: ------------------------------------------------------------                                                              
Jul  2 08:56:40 compute-0 cloud-init[1943]: Traceback (most recent call last):                                                                                        
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/cmd/main.py", line 655, in status_wrapper                               
Jul  2 08:56:40 compute-0 cloud-init[1943]:    ret = functor(name, args)                                                                                              
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/cmd/main.py", line 361, in main_init                                    
Jul  2 08:56:40 compute-0 cloud-init[1943]:    init.apply_network_config(bring_up=bool(mode != sources.DSMODE_LOCAL))                                                 
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/stages.py", line 635, in apply_network_config                           
Jul  2 08:56:40 compute-0 cloud-init[1943]:    netcfg, src = self._find_networking_config()                                                                           
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/stages.py", line 622, in _find_networking_config                        
Jul  2 08:56:40 compute-0 cloud-init[1943]:    if self.datasource and hasattr(self.datasource, 'network_config'):                                                     
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/sources/DataSourceConfigDrive.py", line 154, in network_config          
Jul  2 08:56:40 compute-0 cloud-init[1943]:    self.network_json, known_macs=self.known_macs)                                                                         
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/sources/helpers/openstack.py", line 638, in convert_net_json            
Jul  2 08:56:40 compute-0 cloud-init[1943]:    known_macs = net.get_interfaces_by_mac()                                                                               
Jul  2 08:56:40 compute-0 cloud-init[1943]:  File "/usr/lib/python3.6/site-packages/cloudinit/net/__init__.py", line 551, in get_interfaces_by_mac                    
Jul  2 08:56:40 compute-0 cloud-init[1943]:    (name, ret[mac], mac))                                                                                                 
Jul  2 08:56:40 compute-0 cloud-init[1943]: RuntimeError: duplicate mac found! both 'eth1' and 'br-isolated' have mac '52:54:00:12:cc:94'                             
Jul  2 08:56:40 compute-0 cloud-init[1943]: ------------------------------------------------------------                                                              
Jul  2 08:56:40 compute-0 systemd[1]: cloud-init.service: Main process exited, code=exited, status=1/FAILURE


Version-Release number of selected component (if applicable):
RHOS_TRUNK-15.0-RHEL-8-20190627.n.0