Wait until the ingress has an ip address

After deploying an ingress, it can take up to 40 seconds before it get
an ip address. In this stage, accessing the ingress URL will return 404
"Not Found" error.

Wait until the ingress reports an ip address before finishing the start
script.

Signed-off-by: Nir Soffer <nsoffer@redhat.com>

test/addons/demo/start

@@ -7,6 +7,7 @@ import os
 import sys
 import time
 
+import drenv
 from drenv import commands
 from drenv import kubectl
 
@@ -61,3 +62,12 @@ while True:
     else:
         print(f"Ingress configured in {time.monotonic() - start:.3f} seconds")
         break
+
+print("Waiting until ingress is ready")
+# It can take 40 seconds until the ingress gets an ingress ip address.
+drenv.wait_for(
+    "ingress/demo-ingress",
+    output="jsonpath={.status.loadBalancer.ingress}",
+    timeout=120,
+    profile=cluster,
+)