When using user.map with multiple dataservices,
additional data services must exist in
dataservices.properties. Only add the physical
data services you would like to work with. Any composite data
services will automatically be discovered. The connector must be
restarted once the data services have been added.
Specifying a composite dataservice that has not been defined will
raise an error.
If the user.map contains multiple entries for
the same user, only the last entry will be used.