SERVER-13635: allow smoke.py to use alternate storage engines
SERVER-14378: IndexCatalog should not rely on system.indexes
SERVER-14378: Cloner shouldn't use system.namespaces
SERVER-14378: cloner shouldn't use system.indexes but listIndexes
SERVER-2442: fix db fetching in listCollections command
SERVER-14378: clean list(Collections|Indexes)
SERVER-14378: clean up cloner changes for no system namespaces