fix(test_snapshot): wait for VM to come up before snapshot

When using guest kernel 6.1 these tests started failing. Waiting for
the VM to come up before the snapshot fixes the problems.

Signed-off-by: Riccardo Mancini <[email protected]>

Author: Manciukic

tests/integration_tests/functional/test_api.py

@@ -1166,6 +1166,7 @@ def test_get_full_config_after_restoring_snapshot(microvm_factory, uvm_nano):
         }
     ]
 
+    uvm_nano.wait_for_up()
     snapshot = uvm_nano.snapshot_full()
     uvm2 = microvm_factory.build()
     uvm2.spawn()

tests/integration_tests/functional/test_snapshot_editor.py

@@ -27,6 +27,7 @@ def test_remove_regs(uvm_nano, microvm_factory):
     vm = uvm_nano
     vm.add_net_iface()
     vm.start()
+    vm.wait_for_up()
 
     snapshot = vm.snapshot_full()