Dynamic loading of jars from a url

Dynamic loading is possible from .system collection. It's much easier to host the jars on a remote service and load it from there. This way the user should have no problem in loading jars when the .system collection is not available for some reason.

The steps should look as follows

1. get the hash of your jar file.  openssl dgst -sha512 <jar>
2. upload it your hosting service . say the location is http://host:port/my-jar/location
3. create a runtime lib entry for the collection as follows

   curl http://localhost:8983/solr/techproducts/config -H 'Content-type:application/json' -d '{
      "add-runtimelib": { "name":"jarblobname", "sha512":"e94bb3990b39aacdabaa3eef7ca6102d96fa46766048da50269f25fd41164440a4e024d7a7fb0d5ec328cd8322bb65f5ba7886e076a8f224f78cb310fd45896d" , "url" : "http://host:port/my-jar/loaction"}
   }'
   

to update the jar, just repeat the steps and use the update-runtimelib to update the sha512 hash