Update XrefTest.java
Update XrefTest.java

Updated test to support identifier for primary id
bridgedb/BridgeDb,egonw/BridgeDb,bridgedb/BridgeDb,bridgedb/BridgeDb,egonw/BridgeDb,egonw/BridgeDb,bridgedb/BridgeDb,bridgedb/BridgeDb,egonw/BridgeDb,egonw/BridgeDb