Description of problem:

Trying to install with the instanceType T2.medium and failing with error. 

FATAL waiting for Kubernetes API: context deadline exceeded

How reproducible:

1> Set the instance type to t2.medium in install-confing

~~~
...
  platform:
    aws:
      type: t2.medium
...
~~~

2> Run installer 
  ./openshift-install --dir=ocp4 create cluster

Actual results:
INFO Consuming "Openshift Manifests" from target directory 
INFO Consuming "DNS Config" from target directory 
INFO Consuming "Ingress Config" from target directory 
INFO Consuming "Network Config" from target directory 
INFO Consuming "Common Manifests" from target directory 
INFO Consuming "Kubeconfig Admin" from target directory 
INFO Creating cluster...                          
INFO Waiting up to 30m0s for the Kubernetes API... 
FATAL waiting for Kubernetes API: context deadline exceeded 

Expected results:

Cluster should be up and running