Subo:
- servidor de máquinas virtuales dummy con bug corregido
- infraestructura con timeout en el arranque de máquinas virtuales
  implementado.

 On branch issue_8
 Changes to be committed:

	modified:   clusterServer/main.py
	modified:   clusterServer/reactor/clusterServerReactor.py
	modified:   database/ClusterServerDB.sql
	modified:   database/clusterServer/clusterServerDB.py
	modified:   database/tests/ClusterServerDBTest.sql
	modified:   database/tests/clusterServerDBTests.py
	modified:   testing/clusterServerTester.py
	modified:   testing/dummyVMServer.py