Continue work on Rack Management Board, Cabinet Management board

*Develop and test drivers for RMB (template for CMB);  MCCS-410 implemented a Tango device which interfaced with the subrack management board. Details of the implementation https://confluence.skatelescope.org/download/attachments/116935651/json_interface.pdf *Unit and integration tests to include into MCCS, As part of the MCCS CI/CD pipeline, it is necessary for all merged code to pass integration tests. Demonstration of power and health management. Implement control protocol for remote intelligent hardware devices. During System Demo 10.3 a demo was given by Gianni Comoretto which was recorded as part of the proceeds: https://confluence.skatelescope.org/display/SE/2021-05-06+OMC+ART+System+Demo+10.3 . Document control/command/attribute interface, A Confluence page has also been created which describes the procedures to initialise the subrack and TPM https://confluence.skatelescope.org/display/SE/Tile+device+initialization+procedure