Index should be rebuild during startup for cache stores shared=false

If a cache store is not marked as shared the indexing is skipped.
As a result queries are not possible without calling massindexer

• if a non persistent directory-provider is used (ram)
• for the first start if a cache is stored before without any index
• problematic if the application changed indexing

For this is should be possible to re-build the index automatically during startup.