feat: declare that upgrading everything must be a full upgrade on OpenMediaVault

A plain apt-get upgrade holds back OMV's own packages and the kernel;
omv-upgrade is a dist-upgrade. netOrk reads FULL_UPGRADE when it upgrades
the host (MVP 5).

napalm_openmediavault/openmediavault.py

@@ -53,6 +53,10 @@ class OpenMediaVaultDriver(StorageDriver, LinuxDriver):
 
     TYPE_LABEL = "Storage"
     DRIVER_NAME = "openmediavault"
+    #: "Upgrade everything" must be a full upgrade: OMV's own packages and the
+    #: kernel are held back by a plain ``apt-get upgrade`` (``omv-upgrade`` is a
+    #: dist-upgrade). netOrk reads this when it upgrades the host.
+    FULL_UPGRADE = True
     driver_name = "openmediavault"
     SSH_FINGERPRINT = [
         FingerprintRule("debian", weight=4.0),

tests/test_full_upgrade.py

@@ -0,0 +1,11 @@
+"""OMV says that "upgrade everything" must be a full upgrade on it.
+
+A plain ``apt-get upgrade`` holds back OMV's own packages and the kernel;
+``omv-upgrade`` runs a dist-upgrade. netOrk reads ``FULL_UPGRADE`` to choose.
+"""
+
+from napalm_openmediavault.openmediavault import OpenMediaVaultDriver
+
+
+def test_a_full_upgrade_is_declared():
+    assert OpenMediaVaultDriver.FULL_UPGRADE is True