created thread pool, added basic test. created stub tasks for create machine and bootstrap machine.
adding task errors table, manager, and dao.
updated test to check node deletion, adding bootstrap script to test
removing redundant argument from runScript method.
adding bootstrap task, refactoring
added info column to task errors table.
removing redundant argument from runScript method.
removing redundant argument from runScript method.
removing redundant argument from runScript method.
refactoring to expose a single entry point for the pool manager api.
refactoring to expose a single entry point for the pool manager api.