Added test configuration modules

Added three test configuration modules to be used during testing.
Updated ConfigurationDAO

Updated ConfigurationDAO to reflect the usage of a database to store
configuration values instead of an XML file.
Updated ConfigurationManager

Updated the configuration manager to reflect the relocation of
configuration logic to ConfigurationService. The manager will now act as
a Facade to underlying services.
Added ConfigurationService

Added a configuration service interface, its implementation, and its
test. The ConfigurationService will perform all standard configuration
operations.