Solution : https://service.sap.com/sap/support/notes/1031213 (SAP Service marketplace login required)
Key words : 
set clilibpath=/usr/sap/<sid>/<instance>/clidriver/libsetenv ld_library_path ${ld_library_path}, set clilibpath=/usr/sap/<sid>/<instance>/clidriver/libsetenv libpath ${libpath}, sap system version> -> operations -> database-specific guides   -> sap dba guide, /usr/sap/<sid>/<instance>/clidriver/lib export ld_library_path close, clilibpath=/usr/sap/<sid>/<instance>/clidriver/libld_library_path=$ld_library_path, clilibpath=/usr/sap/<sid>/<instance>/clidriver/liblibpath=$libpath, location /usr/sap/<sid>/sys/global/db2/jdbc, /usr/sap/<sid>/<instance>/clidriver/lib close, directory /usr/sap/<sid>/sys/global/db2/jdbc, license directory /usr/sap/<sid>/<instance>/clidriver/license
Related Notes : 
       
| 1382952 | DB2-z/OS:CCMS: DBA Cockpit: DB2 for z/OS as Remote Database | 
| 1349666 | DB2-z/OS: 7.00 SR3 directory structure for CLI driver | 
| 1043951 | DB2-z/OS: Release of DB2 V9 for SAP Components | 
| 867976 | Changing JDBC driver on WEB AS Java 6.40/NW 7.0x/7.1x | 
| 815202 | DB2-z/OS: Additions upgrade to SAP NW AS 7.0 |