[Plugin] Detect copy operations without the adequate access rights

(e.g. apparmor restriction for '/proc/sys/fs/binfmt' inside a LXD container)

Fix: #1662
Resolves: #1867

Signed-off-by: Eric Desrochers <eric.desrochers@canonical.com>
Signed-off-by: Bryan Quigley <bryan.quigley@canonical.com>

sos/plugins/__init__.py

@@ -744,6 +744,10 @@ def _copy_dir(self, srcpath):
                 path = os.path.join(srcpath, name)
                 self._do_copy_path(path)
         except OSError as e:
+            if e.errno == errno.EPERM or errno.EACCES:
+                msg = "Permission denied"
+                self._log_warn("_copy_dir: '%s' %s" % (srcpath, msg))
+                return
             if e.errno == errno.ELOOP:
                 msg = "Too many levels of symbolic links copying"
                 self._log_error("_copy_dir: %s '%s'" % (msg, srcpath))