Build BTS defs in vars.sh from array

and, Number the BTS from 0 in environment

modules/rhizo_base/files/bin/turn_off_amplifier.sh

@@ -4,7 +4,7 @@ RHIZO_SCRIPT="/home/rhizomatica/bin"
 . $RHIZO_SCRIPT/vars.sh
 LOGFILE="/var/log/monitor_amp.log"
 
-for bts in $BTS1 $BTS2 $BTS3; do
+for bts in $BTS0 $BTS1 $BTS2; do
     logc "Turning off AMP on BTS $bts:";
     ssh root@$bts "sbts2050-util sbts2050-pwr-enable 1 1 0";
 done