During testing it's possible to get into a scenario where all nodes are
offline and list of requests is empty.
Change-Id: I271c0ca2c72009244df13e8bc1441fcd5f3da9e0
Instead of providing the database from outside to testplanet create it
inside and then allow wrapping and modifying it. This is more convenient
to use.
Change-Id: I9b8f69e6e0a19ff984b4e2bfe927c9100c77bc6c