SDP-1161: Finish replacing hardcoded script version numbers with RCS keywords.
The $Id:/$Change: RCS-keyword-based VersionID block (see e.g. upgrade.sh,
verify_sdp.sh) was already in place on most scripts. This finishes the job:
- gen_p4dtg_env.sh, p4login, p4p_base, p4broker_base, p4d_base, run.lib:
migrated from a hardcoded declare Version=X.Y.Z to the VersionID block;
filetype changed to add the +k modifier these rely on.
- verify_sdp.sh: removed two dead, pre-migration declare Version= lines
left over above the real (already-working) VersionID block.
- os_tweaks.sh: removed a dead duplicate "Version ID Block" comment stub
that predated the real, functional block later in the file.