Fix glidein_startup.sh in the staging area to be the one w/ the payload
Starting v3.7 the glidein_startup.sh file sent to the sites includes at the end a tar of content that comes for separate files that were once heredoc inside glidein_startup.sh itself.
This is generated during the upgrade operation and put in all the entry directories, but the file has actually no entry-dependent content, so it should be updated also in the staging area.
E.g. http://gfactory-itb-1.opensciencegrid.org/factory/stage/glidein_startup.sh is the version without the packed files
This could come in handy when using glidein in a vacuum:
The wrapper could also download that automatically from the Factory:
- the Factory URL is known
- the location is standard