Update to the tools scripts:
 * Update to envDefaults: if environmental varialbe ONOS_CELL is set,
   the load it, so its variables can be used by other scripts

 * Modifications inside tools/dev/bash_profile:
   - Update the setting of JAVA_HOME so it works for Ubuntu with
     OpenJDK-1.7
   - Removed "." from being added to the PATH, because it is a security hole
diff --git a/tools/build/envDefaults b/tools/build/envDefaults
index f1e1346..9c17212 100644
--- a/tools/build/envDefaults
+++ b/tools/build/envDefaults
@@ -25,6 +25,9 @@
 export ONOS_TAR=$ONOS_STAGE.tar.gz
 
 # Defaults for ONOS testing using remote machines.
+if [ -n "${ONOS_CELL}" -a -f $ONOS_ROOT/tools/test/cells/${ONOS_CELL} ]; then
+   . $ONOS_ROOT/tools/test/cells/${ONOS_CELL}
+fi
 export ONOS_INSTALL_DIR="/opt/onos"     # Installation directory on remote
 export OCI="${OCI:-192.168.56.101}"     # ONOS Controller Instance
 export ONOS_USER="sdn"                  # ONOS user on remote system