Reduce resource cache size for unit tests
Reduce resource cache size for unit tests

This prevents the unit tests from chewing up too much memory as they
create a lot of small stores.

kentcb/BrightstarDB,kentcb/BrightstarDB,dharmatech/BrightstarDB,dharmatech/BrightstarDB,dharmatech/BrightstarDB,dharmatech/BrightstarDB,kentcb/BrightstarDB,kentcb/BrightstarDB,BrightstarDB/BrightstarDB,BrightstarDB/BrightstarDB,BrightstarDB/BrightstarDB,BrightstarDB/BrightstarDB,dharmatech/BrightstarDB,dharmatech/BrightstarDB