Minor refactoring in the ONOS cell configuration:

 * Each cell-specific variable is explicitly listed
   in the cell config file:
   ONOS_CELL, ONOS_NIC, OC1-OC9, OCN, OCI, ONOS_FEATURES

 * Cleanup and bug fixes inside bash_profile:
   - Don't export explicitly OCI and ONOS_CELL, because those
     are now exported in the cell config file
   - unset ONOS_CELL, ONOS_NIC, ONOS_FEATURES (the last two weren't
     unset before)
   - The built-in "cell" function shows OC1 to OC9 instead of OC0-OC9;
     OC0 is never used/setup anywhere else

 * Added two new shell commands:
   - tools/test/bin/onos-lsit-cells : lists existing ONOS cell configurations
     It is the equivalent of the "cells" built-in bash command
   - tools/test/bin/onos-show-cell : shows the configuration of an ONOS cell
     It is the equivalent of the "cell" built-in bash command, but
     it can show also the configuration of any ONOS cell (not only
     the default one).

@@ -61,15 +61,14 @@ function cell {
     if [ -n "$1" ]; then
         [ ! -f $ONOS_ROOT/tools/test/cells/$1 ] && \
             echo "No such cell: $1" >&2 && return 1
+        unset ONOS_CELL ONOS_NIC ONOS_FEATURES
         unset OC1 OC2 OC3 OC4 OC5 OC6 OC7 OC8 OC9 OCN OCI
         . $ONOS_ROOT/tools/test/cells/$1
-        export OCI=$OC1
-        export ONOS_CELL=$1
         cell
     else
         env | egrep "ONOS_CELL"
         env | egrep "OCI"
-        env | egrep "OC[0-9]+" | sort
+        env | egrep "OC[1-9]+" | sort
         env | egrep "OCN"
         env | egrep "ONOS_" | egrep -v 'ONOS_ROOT|ONOS_CELL'
     fi

+#!/bin/bash
+# -----------------------------------------------------------------------------
+# List available ONOS cells configuration.
+# -----------------------------------------------------------------------------
+
+[ ! -d "$ONOS_ROOT" ] && echo "ONOS_ROOT is not defined" >&2 && exit 1
+. $ONOS_ROOT/tools/build/envDefaults
+
+# Lists available cells
+for cell in $(ls -1 $ONOS_ROOT/tools/test/cells); do
+    if [ ${cell} = "${ONOS_CELL}" ]; then
+        cell_id="${cell} *"
+    else
+        cell_id="${cell}"
+    fi
+    cell_descr="$(grep '^#' $ONOS_ROOT/tools/test/cells/$cell | head -n 1)"
+    printf "%-12s  %s\n" "${cell_id}" "${cell_descr}"
+done

+#!/bin/bash
+# -----------------------------------------------------------------------------
+# Print the configuration of an ONOS cell.
+# -----------------------------------------------------------------------------
+
+[ ! -d "$ONOS_ROOT" ] && echo "ONOS_ROOT is not defined" >&2 && exit 1
+. $ONOS_ROOT/tools/build/envDefaults
+
+function print_usage {
+    echo "Print the configuration of an ONOS cell."
+    echo "If no arguments are specified, it will print the configuration for the default"
+    echo "ONOS cell as specified in the 'ONOS_CELL' environmental variable."
+    echo
+    echo "Optional arguments:"
+    echo "  [cell-name]       Print the configuration of 'cell-name'"
+    echo "  [-h | --help]     Print this help"
+}
+
+if [ "${1}" = "-h" -o "${1}" = "--help" ]; then
+    print_usage
+    exit 0
+fi
+
+if [ -n "${1}" ]; then
+    cell="${1}"
+else
+    if [ -z "${ONOS_CELL}" ]; then
+        echo "Environmental variable 'ONOS_CELL' is not defiled"
+        exit 1
+    else
+        cell="${ONOS_CELL}"
+    fi
+fi
+
+if [ ! -f $ONOS_ROOT/tools/test/cells/${cell} ]; then
+    echo "No such cell: ${cell}"
+    exit 1
+fi
+
+# Load the cell setup
+. $ONOS_ROOT/tools/test/cells/${cell}
+
+echo "ONOS_CELL=${ONOS_CELL}"
+echo "ONOS_NIC=${ONOS_NIC}"
+for n in {0..9}; do
+    ocn="OC${n}"
+    if [ -n "${!ocn}" ]; then
+        echo "$ocn=${!ocn}"
+    fi
+done
+echo "OCN=${OCN}"
+echo "OCI=${OCI}"
+echo "ONOS_FEATURES=${ONOS_FEATURES}"

 # Local VirtualBox-based single ONOS instance & ONOS mininet box
 
+export ONOS_CELL="cbench"
+
 export ONOS_NIC=192.168.56.*
 export OC1="192.168.56.103"
 export OCN="192.168.56.103"
+export OCI="${OC1}"
 
 export ONOS_FEATURES="webconsole,onos-api,onos-core-trivial,onos-cli,onos-openflow,onos-app-fwd"

 # Local VirtualBox-based ONOS instances 1,2 & ONOS mininet box
 
+export ONOS_CELL="local"
+
 export ONOS_NIC=192.168.56.*
 export OC1="192.168.56.101"
 export OC2="192.168.56.102"
-
 export OCN="192.168.56.103"
+export OCI="${OC1}"
+
+export ONOS_FEATURES=""

 # ProxMox-based cell of ONOS instance; no mininet-box
 
-export ONOS_FEATURES="webconsole,onos-api,onos-core-trivial,onos-cli,onos-openflow,onos-app-fwd,onos-app-mobility,onos-app-tvue,onos-app-proxyarp"
+export ONOS_CELL="office"
 
 export ONOS_NIC="10.128.4.*"
 export OC1="10.128.4.60"
+export OCI="${OC1}"
+
+export ONOS_FEATURES="webconsole,onos-api,onos-core-trivial,onos-cli,onos-openflow,onos-app-fwd,onos-app-mobility,onos-app-tvue,onos-app-proxyarp"

 # ProxMox-based cell of ONOS instances 1,2 & ONOS mininet box
 
+export ONOS_CELL="prox"
+
 export ONOS_NIC="10.1.9.*"
 export OC1="10.1.9.94"
 export OC2="10.1.9.82"
-
 export OCN="10.1.9.93"
+export OCI="${OC1}"
+
+export ONOS_FEATURES=""

 # Local VirtualBox-based single ONOS instance & ONOS mininet box
 
+export ONOS_CELL="single"
+
 export ONOS_NIC=192.168.56.*
 export OC1="192.168.56.101"
 export OCN="192.168.56.103"
+export OCI="${OC1}"
+
+export ONOS_FEATURES=""

 # Local VirtualBox-based ONOS instances 1,2,3 & ONOS mininet box
 
+export ONOS_CELL="triple"
+
 export ONOS_NIC=192.168.56.*
 export OC1="192.168.56.101"
 export OC2="192.168.56.102"
 export OC3="192.168.56.104"
-
 export OCN="192.168.56.103"
+export OCI="${OC1}"
+
+export ONOS_FEATURES=""