Experimental monitoring tests
Lock test on database (using fork)
Distributed lock testing
Mongo sequences; locks tests using sequences
Lock with timeout
Fixes in lock tests
Reverting grid_facade testing code changes
Merge branch 'monitoring_tests' into mongo_lock
Changed lock usage in facades
Refactored monitoring code; separate locks test
Reverting probe time to 60 sec in InfrastructureFacade
Merge remote-tracking branch 'origin/mongo_lock'

Conflicts:
	app/models/infrastructure_facades/pl_grid_facade.rb
Require csv where necessary package.