Update cell related util scripts to support larger cluster [ONOS-467]

Change-Id: Ie182397b7da92212cdaf6e1622b1482408b6de59

@@ -78,7 +78,8 @@ function cell {
         [ ! -f $ONOS_ROOT/tools/test/cells/$1 ] && \
             echo "No such cell: $1" >&2 && return 1
         unset ONOS_CELL ONOS_NIC ONOS_FEATURES ONOS_USER ONOS_GROUP
-        unset OC0 OC1 OC2 OC3 OC4 OC5 OC6 OC7 OC8 OC9 OCN OCI
+        unset OCI OCN
+        unset $(env | sed -n 's:\(^OC[0-9]\{1,\}\)=.*:\1 :g p')
         export ONOS_CELL=$1
         . $ONOS_ROOT/tools/test/cells/$1
         cell

@@ -49,7 +49,7 @@ function getcmd() {
 # early sanity check for instances/arguments
 [ -z "$1" ] && usage && exit 0
 
-OCIS=( $(env | sed -ne 's:OC[0-9]=\(.*\):\1 :g p' | sort -k1) )
+OCIS=( $(env | sed -ne 's:OC[0-9]\{1,\}=\(.*\):\1 :g p' | sort -k1) )
 if [ -z "$OCIS" ]; then
   printf "no controller instances, quitting early" >&2 && exit 0
 fi

@@ -42,7 +42,9 @@ fi
 
 echo "ONOS_CELL=${ONOS_CELL}"
 echo "ONOS_NIC=${ONOS_NIC}"
-for n in {0..9}; do
+# get number of OC variables
+max=$( env | egrep 'OC[0-9]+' | wc -l )
+for n in $( seq 0 ${max} ); do
     ocn="OC${n}"
     if [ -n "${!ocn}" ]; then
         echo "$ocn=${!ocn}"