Lint: add check for warnings also on CI

Signed-off-by: NCleber Rosa <crosa@redhat.com>

selftests/checkall

@@ -161,7 +161,7 @@ results_dir_content() {
 
 [ "$SKIP_RESULTSDIR_CHECK" ] || RESULTS_DIR_CONTENT="$(ls $RESULTS_DIR 2> /dev/null)"
 if [ "$TRAVIS" == "true" ]; then
-    run_rc lint 'RESULT=$(mktemp); inspekt lint --exclude=.git --enable W0102,W0611 &>$RESULT || { cat $RESULT; rm $RESULT; exit -1; }; rm $RESULT'
+    run_rc lint 'RESULT=$(mktemp); inspekt lint --exclude=.git --enable W0102,W0611,W0612,W0622 &>$RESULT || { cat $RESULT; rm $RESULT; exit -1; }; rm $RESULT'
 else
     run_rc lint 'inspekt lint --exclude=.git --enable W0102,W0611,W0612,W0622'
 fi