Fix http repository issues in pom.xml

[amoeba]

With the tip of develop_2.3 and Maven 3.8.2, I get the following error on a mvn install:

[ERROR] Failed to execute goal on project d1_cn_index_processor: Could not resolve dependencies for project org.dataone:d1_cn_index_processor:jar:2.4.0-SNAPSHOT: Failed to collect dependencies at org.apache.solr:solr-core:jar:5.2.1 -> org.restlet.jee:org.restlet:jar:2.3.0: Failed to read artifact descriptor for org.restlet.jee:org.restlet:jar:2.3.0: Could not transfer artifact org.restlet.jee:org.restlet:pom:2.3.0 from/to maven-default-http-blocker (http://0.0.0.0/): Blocked mirror for repositories: [maven-restlet (http://maven.restlet.org, default, releases+snapshots), apache.snapshots (http://repository.apache.org/snapshots, default, disabled)] -> [Help 1]

Maven deprecated the use of non-https repository URLs in 3.8.1 and the build fails seemingly because of that. I guess restlet is a transitive dependency here and solr-core 5.2.1 references it via a non-https URL. While this check can be disabled locally, I think it's way better if our code just mvn $whatevers cleanly. I bet we can also work around this by upgrading solr-core as I assume they must've fixed this some time in the last few major versions (we're on a 2015 build).

This changes our dataone maven repo to use https and puts in an override mirror for for Restlet since the POM for the version of solr-core we use appears to include a link to the http restlet mirror.

@taojing2002 I PR'd this so you could make sure this isn't just a setup issue on my system and so you could confirm the error I see above happens for you without this patch. Could you take a look?

[amoeba]

Heya @taojing2002 or @datadavev , do either of you you want to review this? I'm happy to merge.

[amoeba]

Chatted with @taojing2002 just now and the change looks good and works for him.