Add firstboot test to postinstall job

Signed-off-by: Samuel Verschelde <stormi-xcp@ylix.fr>

Author: stormi

jobs.py

@@ -35,6 +35,7 @@ class JobData(TypedDict):
             "--vm": "single/small_vm",
         },
         "paths": [
+            "tests/xapi/firstboot",
             "tests/xo/test_xo_connection.py",
             "tests/misc",
             "tests/system",