SSDM-13637: Refactoring of metadata executor logic - creating custom executor for updating metadata.

SSDM-13637: Added unit tests for meta_data field in sample, sample_type, dataset, dataset_type, experiment, experiment_type; Amended EntityTypeBO to copy meta_data information.

SSDM-13637: Added meta_data field to experiment and experimentType; amended java and javascript APIs

SSDM-13672: V3 API: Remove flag codeBeatsAutoGeneratedCode from SampleCreation. Fix bug in behavior of sample creation: Specified sample code suppersede auto generated code flags.

SSDM-13672: V3 API extension: dictionary for EnglishTest extended for the new flag codeBeatsAutoGeneratedCode

SSDM-13672: V3 API extension: Flag codeBeatsAutoGeneratedCode added to SampleCreation. This allows to specify sample code even though sample type has autoGeneratedCode set

SSDM-13524: Added type-safe setProperty methods to IPropertiesHolder; extended DataSet, Experiment, Material, Sample DTOs; Amended generator