Update solr.install.dir to opt/solr

Author: rfay

solr/conf/solrcore.properties

@@ -9,5 +9,5 @@ solr.autoCommit.MaxDocs=-1
 solr.autoCommit.MaxTime=15000
 solr.autoSoftCommit.MaxDocs=-1
 solr.autoSoftCommit.MaxTime=-1
-
+solr.install.dir=/opt/solr
 solr.luceneMatchVersion=8.11