fix lease targeting missing parts

Make create_lease selector optional, harden the name-targeted lease parser test fixture, and reduce e2e flakiness by waiting for exporter reconnection before reusing it.

Assisted-by: GPT-5.3 Codex
Signed-off-by: Bella Khizgiyaev <bkhizgiy@redhat.com>

Author: bkhizgiy

e2e/tests.bats

@@ -360,6 +360,9 @@ EOF
   jmp shell --client test-client-sa     --name test-exporter-sa     j power on
   jmp shell --client test-client-legacy --name test-exporter-legacy j power on
 
+  # Reusing the same exporter immediately can be flaky while it reconnects.
+  wait_for_exporter
+
   # --name and --selector together should work when they match.
   jmp shell --client test-client-oidc --name test-exporter-oidc --selector example.com/board=oidc j power on
 }

python/packages/jumpstarter-kubernetes/jumpstarter_kubernetes/test_leases.py

@@ -115,7 +115,7 @@ def test_lease_dump_yaml():
     )
 
 
-def test_lease_from_dict_without_match_labels():
+def test_lease_from_dict_without_match_labels_name_targeted():
     lease = V1Alpha1Lease.from_dict(
         {
             "apiVersion": "jumpstarter.dev/v1alpha1",
@@ -133,6 +133,7 @@ def test_lease_from_dict_without_match_labels():
                 "clientRef": {"name": "test-client"},
                 "duration": "1h",
                 "selector": {},
+                "exporterRef": {"name": "test-exporter"},
             },
             "status": {
                 "ended": False,

python/packages/jumpstarter/jumpstarter/config/client.py

@@ -222,8 +222,8 @@ async def list_exporters(
     @_handle_connection_error
     async def create_lease(
         self,
-        selector: str | None,
         duration: timedelta,
+        selector: str | None = None,
         exporter_name: str | None = None,
         begin_time: datetime | None = None,
         lease_id: str | None = None,