Fixes of technical Debt

I can not mark errors as false positives. So I send the following list of my Issues who are false negatives. They need to be marked as false negatives by a person with the rights to do that.

https://scm.thm.de/sonar/issues/search#issues=AVUCS1mXZZaz45oU5hKf https://scm.thm.de/sonar/issues/search#issues=AVUCS1mYZZaz45oU5hKh https://scm.thm.de/sonar/issues/search#issues=AVR7n7pRgTeNb6aDUiJU https://scm.thm.de/sonar/issues/search#issues=AVU06667hHvo-MxF_DPj https://scm.thm.de/sonar/issues/search#issues=AVWcx-wV_ZGzjbhSyccO https://scm.thm.de/sonar/issues/search#issues=AVTcp_ptZZaz45oU5hJS https://scm.thm.de/sonar/issues/search#issues=AVTQGy07ZZaz45oU5hJJ https://scm.thm.de/sonar/issues/search#issues=AVUXweB-ZZaz45oU5hM1 https://scm.thm.de/sonar/issues/search#issues=AVUXweB-ZZaz45oU5hM2 https://scm.thm.de/sonar/issues/search#issues=AVREM2YPK-KeNIHUVgwH https://scm.thm.de/sonar/issues/search#issues=AVRnzbD6K-KeNIHUVgzN https://scm.thm.de/sonar/issues/search#issues=AVRnzbD6K-KeNIHUVgzO https://scm.thm.de/sonar/issues/search#issues=AVREM2Y5K-KeNIHUVgwM https://scm.thm.de/sonar/issues/search#issues=AVREM2ZUK-KeNIHUVgwN https://scm.thm.de/sonar/issues/search#issues=AVREM2aFK-KeNIHUVgwO https://scm.thm.de/sonar/issues/search#issues=AVRnzbGAK-KeNIHUVgzS https://scm.thm.de/sonar/issues/search#issues=AVUmxrQmhHvo-MxF_DOr https://scm.thm.de/sonar/issues/search#issues=AVWYlihZ_ZGzjbhSycbN https://scm.thm.de/sonar/issues/search#issues=AVSkHxGeZZaz45oU5hGq https://scm.thm.de/sonar/issues/search#issues=AVSkHxGeZZaz45oU5hGr https://scm.thm.de/sonar/issues/search#issues=AVSkHxGeZZaz45oU5hGs https://scm.thm.de/sonar/issues/search#issues=AVSkHxGxZZaz45oU5hGv https://scm.thm.de/sonar/issues/search#issues=AVREM2a6K-KeNIHUVgwR https://scm.thm.de/sonar/issues/search#issues=AVRcU5YZK-KeNIHUVgyB