Adding Solr Basic Authentication

[luddaniel]

I think it would be nice to enable basic authentication of SOLR as another security layer.
In Java code it would be something like SolrRequest.setBasicAuthCredentials(String user, String password) added to IndexServiceBean.java
With the possibility of adding user and password in DB setting like :SolrHostColonPort
We are not currently working on a PR.

[pdurbin]

@luddaniel thanks for opening this issue!

As I said in chat, when we add the config setting for this we should follow the MPCONFIG pattern @poikilotherm added for Solr in this PR:

• 7000 mpconfig solr #8825

Here's a preview of the docs: http://preview.guides.gdcc.io/en/develop/installation/config.html#dataverse-solr-host

I'm not sure how to size this exactly. My guess is a 33 (roughly 3 days).