Problems during extension compatibility check via typo3_console

[Thomas Heilmann]

During the extension compatibility check done by typo3_console, the TCA is not yet loaded when loading ext_tables.php files. Thus, a warning is triggered as TCA is needed for translation handling (in TYPO3\CMS\Core\Utility\RootlineUtility::enrichWithRelationFields).

As a solution, we could check if TCA is initialized before generating the $translateToMessage in ext_tables.php.