update operator_libs_linux (#439)

Author: Lucas Gameiro

lib/charms/operator_libs_linux/v2/snap.py

@@ -83,7 +83,7 @@
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 4
+LIBPATCH = 5
 
 
 # Regex to locate 7-bit C1 ANSI sequences
@@ -580,10 +580,17 @@ def ensure(
             # We are installing or refreshing a snap.
             if self._state not in (SnapState.Present, SnapState.Latest):
                 # The snap is not installed, so we install it.
+                logger.info(
+                    "Installing snap %s, revision %s, tracking %s", self._name, revision, channel
+                )
                 self._install(channel, cohort, revision)
             else:
                 # The snap is installed, but we are changing it (e.g., switching channels).
+                logger.info(
+                    "Refreshing snap %s, revision %s, tracking %s", self._name, revision, channel
+                )
                 self._refresh(channel=channel, cohort=cohort, revision=revision, devmode=devmode)
+            logger.info("The snap installation completed successfully")
 
         self._update_snap_apps()
         self._state = state