Remove enableRemoteStreaming from solrconfig (#3791)

This is no longer a recommended or default configuration, and Solr actively discourages it.

Author: cbeer

lib/generators/blacklight/templates/solr/conf/solrconfig.xml

@@ -187,7 +187,7 @@
   <requestHandler name="/replication" class="solr.ReplicationHandler" startup="lazy" />
 
   <requestDispatcher handleSelect="true" >
-    <requestParsers enableRemoteStreaming="true" multipartUploadLimitInKB="2048" />
+    <requestParsers multipartUploadLimitInKB="2048" />
   </requestDispatcher>
 
   <requestHandler name="/analysis/field" startup="lazy" class="solr.FieldAnalysisRequestHandler" />