Update build.xml to include callcenter example.
Update build.xml to include callcenter example.

migue/voltdb,paulmartel/voltdb,VoltDB/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,migue/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,migue/voltdb,deerwalk/voltdb,deerwalk/voltdb,migue/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,migue/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,paulmartel/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,paulmartel/voltdb,deerwalk/voltdb,migue/voltdb,VoltDB/voltdb,paulmartel/voltdb,paulmartel/voltdb,migue/voltdb,VoltDB/voltdb,VoltDB/voltdb,migue/voltdb