[OSGeo] #3078: Rename nexus-2 back to nexus and change other scripts accordingly

[OSGeo]

#3078: Rename nexus-2 back to nexus and change other scripts accordingly
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 Reporter:  robe      |      Owner:  sac@…
     Type:  task      |     Status:  new
 Priority:  normal    |  Milestone:  Sysadmin Contract 2024-I
Component:  SysAdmin  |   Keywords:
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 As mentioned in #2932 I ran into issues after fiddling with the security
 setting of nexus, so I had created a new version and called it nexus-2.

 I have now successfully deleted the old nexus, so can put nexus-2 back to
 original name of nexus.  Instead of a rename, I'm planning to do a copy as
 I think that is a bit faster and will result in no downtime.

 Once done, I will switch the backup scripts for osgeo4, back to copying
 nexus and also the webconfigs for docker*.osgeo.org and repo.osgeo.org
 back to nexus.
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Ticket URL: <https://trac.osgeo.org/osgeo/ticket/3078>
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