Version-Release number of selected component (if applicable): 4.12.25

Steps to Reproduce:{code:none}
1.Install-config yaml and rendezvousIP set to one of the worker node IP or
Don't mention rendezvousIP at all but in the agent-config.yaml put the worker node on the first place 
2.
3.

Worker node chooses to be the rendezvous node and after 2 control plane nodes installed the api hand over to the third node that act as control plan and then hand over again to one of the control plane node that has been installed

In case the user define one of the worker nodes as rendezvousIP in the install-config.yaml the agent creation should be failed
In case there is no rendezvousIP in the install-config.yaml the first agent with both role master and static ip should be choose as rendezvous node. 

Additional info:{code:none}
need to be check:
The first node with role master have DHCP only IPs 
Another test - There is no static IP for all the master nodes, but at least one of the worker have static IP