Added support for 'p4 monitor -L'.
Changes:
* Added 'sudo /usr/bin/lsof' to sudoers commands.
* Added 'monitor.lsof=sudo /usr/bin/lsof -F pln' as configurable in configurables.cfg,
so that 'ccheck.sh' (the best practice configurables check) will search for it.
* Updated configure_new_server.sh to set this value.
* Added 'lsof' so list of SDP standard pacakges in install_sdp.sh.
Note that 'sudo' is reliably found in /usr/bin/lsof across Linux distros,
so this was deemed safe to hard-code.
Fixes: SDP-1265 (Feature): Support 'p4 monitor -L' by default.