allow use of the latest global tag for a given CondDB partition
When the special value <latest:DataType>
(where DataType
is the data type
string) is used as global tag for a CondDB partition in the CondDB configurable,
the latest global tag for the specified data type is used for that partition.
DDDBConf updated to default to latest global tag for DQFLAGS partition
See LHCBPS-1649