Add workflowengine to check-code call

.travis.yml

@@ -30,7 +30,7 @@ install:
 
 script:
   - sh -c "if [ '$TC' = 'syntax' ]; then composer install && lib/composer/bin/parallel-lint --exclude lib/composer/jakub-onderka/ --exclude 3rdparty/symfony/polyfill-php70/Resources/stubs/ --exclude 3rdparty/patchwork/utf8/src/Patchwork/Utf8/Bootup/ --exclude 3rdparty/paragonie/random_compat/lib/ --exclude lib/composer/composer/autoload_static.php --exclude 3rdparty/composer/autoload_static.php .; fi"
-  - sh -c "if [ '$TC' = 'app:check-code' ]; then ./occ app:check-code admin_audit; ./occ app:check-code comments; ./occ app:check-code federation; fi"
+  - sh -c "if [ '$TC' = 'app:check-code' ]; then ./occ app:check-code admin_audit; ./occ app:check-code comments; ./occ app:check-code federation; ./occ app:check-code workflowengine; fi"
   - sh -c "if [ '$TEST_DAV' != '1' ]; then echo \"Not testing DAV\"; fi"
   - sh -c "if [ '$TEST_DAV' = '1' ]; then echo \"Testing DAV\"; fi"