NLB environment for sensenet

[tusmester]

Create an NLB environment on test servers where we can run multiple sensenet repository instances with a single search service.

Test

• Make sure different containers log using a unique identifier.
• create/modify a content and follow the flow in the log (db, indexing, invalidation, etc)
• load test from a client tool with many/huge content items (workspaces? documents?)
• check index consistency (or index document using the new api)