(ReconnectionTests make no sense for MappingStorage).

Also add BDBTimeoutTests.

Set the level for the FileStorageConnectionTests,
FileStorageTimeoutTests, BDBConnectionTests, BDBReconnectionTests, and
BDBTimeoutTests to level 2 so they aren't normally run.

MappingStorageConnectionTests and MappingStorageTimeoutTests both get
level 1 so they are normally always run.  FileStorageReconnectionTests
also gets level 1 since there s no MappingStorageReconnectionTests.