[TASK] Adding TestCase for Highlighter/Configuration bridge
[TASK] Adding @codeCoverageIgnore* statements

Because mainly the backend classes are not executed within an Extbase context
and therefore cannot use the DIC, it is necessary to implement NULL checks and
instantiate the objects through GeneralUtility::makeInstance() respectively by
ObjectManager::get() (if injected). These NULL checks cannot be tested and get
the proper PHPUnit annotation to be excluded by CodeCoverage.
[TASK] Ignore glue code (NewContentElementWizard)
[TASK] Renaming TestCases