Subo código que corrige los issues #21 y #22.

 On branch vm_server_cleanup
 Changes to be committed:

	modified:   database/tests/vmServerDBTests.py
	modified:   database/utils/connector.py
	deleted:    database/vmServer/imageManager.py
	renamed:    database/vmServer/runtimeData.py -> database/vmServer/vmServerDB.py
	modified:   testing/virtualMachineServerTester.py
	modified:   virtualMachineServer/constantes.py
	modified:   virtualMachineServer/vmServer.py