Add journal update script to remove Agents and Order IDs from a Controller's or Agent's journal

Current Situation

• The JS7 Controller and Agent make use of a journal to store infrastructure information and transactional data.
  • The journal is located in the <data>/state directory of the Controller's or Agent's data directory.
  • The journal consists of a number of files.
• There can be situations when changes to a journal are required:
  • Examples
    • If users find inconsistent journals due to problems with the storage layer.
    • If users find orders holding an inconsistent state that cannot be cancelled from the JOC Cockpit GUI.
    • If users would not properly decomission an Agent but drop the Agent's machine. In this situation the Controller holds the information about the unreachable Agent. 
  • Changes to a journal are considered critical and must be performed with care.

Desired Behavior

• A shell script is provided to remove Agents and Order IDs from a Controller's or Agent's journal.
• The proceeding includes
  • to shutdown the Controller or Agent instance for which the journal should be updated,
  • to take a backup of the journal,
  • to apply changes to the journal by use of the Journal Update Script,
  • to start the Controller or Agent instance.