Solr updated to 6.6.4
<configuration>
<!-- Version of Solr should be retrieved from a property file as well
as the SHA1 -->
- <url>http://archive.apache.org/dist/lucene/solr/6.6.2/solr-6.6.2.tgz</url>
- <sha1>e4a772a7770010f85bfce26a39520584a85d5c3f</sha1>
+ <url>http://archive.apache.org/dist/lucene/solr/6.6.4/solr-6.6.4.tgz</url>
+ <sha1>8a7c9571fe5b8a2779c85f43b4bb2316a2ec2afe</sha1>
<unpack>true</unpack>
</configuration>
</execution>
