Remove annoying debug info from wlst.sh

I normally run /opt/oracle/fmw11_1_1_5/osb/common/bin/wlst.sh for all WLST commands.

This print a page of debug information (mostly, twice the CLASSPATH and once the PATH.
It's a lot of unneeded info which clutters the logs.

The script will invoke in sequence:

/opt/oracle/fmw11_1_1_5/osb/common/bin/setHomeDirs.sh
/opt/oracle/fmw11_1_1_5/utils/config/10.3/setHomeDirs.sh
/opt/oracle/fmw11_1_1_5/oracle_common/common/bin/wlst.sh

...
and plenty of other scripts, but finally it will call /opt/oracle/fmw11_1_1_5/wlserver_10.3/common/bin/wlst.sh
it's interesting that we have 4 wlst.sh scripts:

/opt/oracle/fmw11_1_1_5/oracle_common/common/bin/wlst.sh
/opt/oracle/fmw11_1_1_5/osb/common/bin/wlst.sh
/opt/oracle/fmw11_1_1_5/osb/harvester/wlst.sh
/opt/oracle/fmw11_1_1_5/wlserver_10.3/common/bin/wlst.sh

One echo is in /opt/oracle/fmw11_1_1_5/wlserver_10.3/common/bin/wlst.sh
The other echo CLASSPATH=$CLASSPATH statement is in
/opt/oracle/fmw11_1_1_5/wlserver_10.3/server/bin/setWLSEnv.sh