Wording of 404static.xhtml is not generic

[JeyaSam]

Hi!
Creating this as a follow-up from https://dataverse.zulipchat.com/#narrow/channel/378866-troubleshooting/topic/404static.2Exhtml.20file . 404static.xhtml file introduced in v6.0 is not generic and contains harvard specific link and text:

So, we suggest following changes to 404static.xhtml to make it more generic:

1. Remove following code snippet as it is Harvard specific:
   

   
   

   Copyright © 2023, The President & Fellows of Harvard College | Privacy Policy
   

   
   

2. In the file, #{bundle['footer.dataverseProject']} is used for Header. Instead can use #{bundle['dataverse']}:
   Reference to code:
   

   
   <h:outputFormat class="navbar-brand custom-logo" value="#{bundle['footer.dataverseProject']}"/>
   

3. The logo image at the bottom could be specified as "./resources/images/dataverseproject_logo.png" instead of "https://cdn.rawgit.com/IQSS/dataverse/develop/src/main/webapp/resources/images/dataverseproject_logo.png" .
   Some installations like us may face CSP restriction to have external link references as shown below:

The missing alert-danger spec for error message is also due to this external reference URL of bootstrap.min.css and bootstrap-theme.min.css in 404static.xhtml file.