SSDM-13300: Change how data_set search command works, added functionality to download command to read data from the input csv file. Fixed documentation.

SSDM-13300: renamed type param in search command. Refactored download command to perform checksum check of files

SSDM-13330: Removed get/set/clear boolean flags, added enum for differentiating these operations. Prepared PhysicalDadaMgmt for implementation of object/collection get/set

SSDM-13330: Added PhysicalDataMgmt for handling data stored in DSS, implemented init command for physical data. Refactored code.

SSDM-7140: fixed more path issues; disabled clone/move/addref/removeref command when obis_metadata_folder is set