[WIP] Abstract procedure

Created by: IvarsKarpics

• Added variables offline_processing_methods and online_processing_methods to the Beamline. Both are lists of strings and are populated based on beamline_config.yml. Processing methods are are listed in the processing widget. For example: offline_processing_methods = ["EDNAProc", "AutoProc"] will result in displaying "Run offline processing (EDNAProc, AutoProc)". If not method is defined then the checkbox is unchecked and disabled.
• Renamed run_processing_parallel to run_offline_processing. True will check the checkbox "Run offline processing" in processing_widget.
• Cleaned up AbstractCollect: removed not used imports, inherit class from AbstractProcedure, implemented _pre_execute, _execute and post_execute. Currently methods are empty and in the next PR will be reviewed.
• AbstractOnlineProcessing is inherited now from AbstractProcedure. Removed not used code.
• Cleaned AbstractProcedure. For sure it is not the final version, but at least to start with.
• CollectMockup reviewed and cleaned.
• queue_entry is modified based on signals emitted by CollectMockup, OnlineProcessingMockup (both based on AbstractProcedure)

Now mockup data collection is running and there are online processing results displayed.