session-lockdown-no-deny: only ignore FileNotFoundError

If we fail to read the AppArmor profile or other required information
due to a time-of-check/time-of-use difference (the process exits)
then that's fine. Otherwise, it's a problem and we should fail,
although we might as well continue testing and get more complete
results.

Reviewed-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D3770

apparmor/session-lockdown/no-deny

@@ -103,8 +103,11 @@ def get_processes(profiles):
                     else:
                         not_ok('process {} {!r} context {!r} could not be '
                                'parsed'.format(filename, exe, p))
-            except:
+            except FileNotFoundError:
+                # probably the process exited after the listdir()
                 pass
+            except Exception as e:
+                not_ok(str(e))
 
     return processes