OZG-4949 ConfigurationParameter with settings field and json types

...java/de/ozgcloud/admin/common/ValidationMessageCodes.java

...va/de/ozgcloud/admin/configurationparameter/Absender.java

.../admin/configurationparameter/ConfigurationParameter.java

...figurationparameter/ConfigurationParameterRepository.java

...d/admin/configurationparameter/DataRestConfiguration.java

.../ozgcloud/admin/configurationparameter/PostfachDaten.java

...va/de/ozgcloud/admin/configurationparameter/Settings.java

...va/de/ozgcloud/admin/configurationparameter/Signatur.java

...in/java/de/ozgcloud/admin/postfach/AbsenderValidator.java

...a/de/ozgcloud/admin/postfach/PostfachDatenRepository.java

...va/de/ozgcloud/admin/postfach/PostfachDatenValidator.java

...in/java/de/ozgcloud/admin/postfach/SignaturValidator.java

...va/de/ozgcloud/admin/postfach/ValidatorEventRegister.java

...oud/admin/configurationparameter/AbsenderTestFactory.java

.../configurationparameter/ConfigurationParameterITCase.java

...igurationparameter/ConfigurationParameterTestFactory.java

...oud/admin/configurationparameter/PostfachDatenITCase.java

...dmin/configurationparameter/PostfachDatenTestFactory.java

...oud/admin/configurationparameter/SignaturTestFactory.java

.../java/de/ozgcloud/admin/postfach/PostfachDatenITCase.java