Issue 996 - adding agent to rpc for processing approvals.
Issue 996: Events now inserted into database with UUID for agent.
Issue 996 Using user pk(id) as agent identifier.
Merge branch 'joseph' of git.artefactual.com:archivematica into Issue996

Conflicts:
	src/MCPServer/lib/unit.py
	src/MCPServer/lib/unitTransfer.py
	src/MCPServer/share/mysql2
Merge branch 'master' of git.artefactual.com:archivematica into Issue996
Merge branch 'master' of git.artefactual.com:archivematica into Issue996
Resolving conflict between variable names.

refs #1651