jenkins system test kit properties writer: get branch ids from environment rather than job name
jenkins system test kit properties writer: get branch ids from environment rather than job name

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