EXECUTION_SCRIPT=${0##*/}
 EXECUTION_SCRIPT=${EXECUTION_SCRIPT%%.*} 
example:
1.
/export/opt/NellyTRS/rel_ver/scripts/testEnv.sh
EXECUTION_SCRIPT=testEnv
 
2.
./testEnv.sh
EXECUTION_SCRIPT=testEnv
 
3.
testEnv.sh
EXECUTION_SCRIPT=testEnv