some tests have to be refactored

[BenjaminQuandt]

While trying to add travis ci I found some problems with the tests.

• tx_mksearch_tests_DbTestcase:
  -Automatic TCA migration done during bootstrap. Please adapt TCA accordingly, these migrations will be removed. The backend module "Configuration -> TCA" shows the modified values. Please adapt these areas: The TCA setting ['ctrl']['requestUpdate'] was removed from table tx_mksearch_indexerconfigs. The column field(s) "extkey" and "contenttype" were updated and contain option "'onChange' => 'reload'" parallel to 'config' and 'label' section. The TCA setting ['ctrl']['requestUpdate'] was removed from table tx_mksearch_indices. The column field(s) "engine" were updated and contain option "'onChange' => 'reload'" parallel to 'config' and 'label' section. The TCA table 'pages_language_overlay' is not used anymore and has been removed automatically in order to avoid negative side-effects.

Warnings:

• Failed asserting that a string is not empty.
• IndexerConfigurationFieldTest

Errors:

• array_keys() expects parameter 1 to be array, null given

• tx_mksearch_tests_Testcase

• Uncaught require(typo3-mksearch/.Build/Web/typo3conf/LocalConfiguration.php)

• tx_mksearch_tests_filter_LuceneBaseTest

• tx_mksearch_tests_util_TikaTest

• A cache with identifier cache_runtime does not exist.

• tx_mksearch_tests_hooks_IndexerAutoUpdateTest

• Error: Call to a member function isConnected() on null

• tx_mksearch_tests_indexer_TtContentTest.php

• tx_mksearch_tests_service_internal_IndexTest.php

• The requested database connection named \"Default\" has not been configured.

• tx_mksearch_tests_indexer_ttcontent_NormalTest

• Error: Class 'TYPO3\CMS\Core\TimeTracker\NullTimeTracker' not found

• tx_mksearch_tests_marker_FacetTest.php

• tx_mksearch_tests_marker_IrfaqTest.php