Wait cluster responsive (#639)

* wait for cluster to respond before creating auth config map

* adds changelog entry

* fixup tf format

* fixup kubernetes required version

* fixup missing local for kubeconfig_filename

* combine wait for cluster into provisioner on cluster; change status check to /healthz on endpoint

* fix: make kubernetes provider version more permissive

versions.tf

@@ -2,10 +2,11 @@ terraform {
   required_version = ">= 0.12.9"
 
   required_providers {
-    aws      = ">= 2.38.0"
-    local    = ">= 1.2"
-    null     = ">= 2.1"
-    template = ">= 2.1"
-    random   = ">= 2.1"
+    aws        = ">= 2.38.0"
+    local      = ">= 1.2"
+    null       = ">= 2.1"
+    template   = ">= 2.1"
+    random     = ">= 2.1"
+    kubernetes = ">= 1.6.2"
   }
 }