Bump MongoDB version to 2.6.5
Avoid NPE in MongoDBShardClusterImpl
MongoDBShardedDeployment: support spec for each type

- Config keys for setting member spec of each type of cluster: for
  the routers, the Replica Set and the config servers.
  Important for if want to give different config files to each.
- Supply test-config for integration test, so doesn’t create massive
  files.
Default mongo.conf: quiet=false for production
Fix MongoDBConfigServerIntegrationTest

- use test-mongodb-configserver.conf, rather than that for the
  members of the replica set.
test-mongodb: decrease disk usage with noprealloc
MongoDBServer: white space tidy
Bump cassandra v2 test version to 2.0.11

- and uploaded 2.0.11 artifact to developer.cloudsoftcorp.com
This closes #277