Update solr to latest Dockerfile with changes following 1st round review by psftw

library/solr

@@ -1,7 +1,7 @@
 # maintainer: Martijn Koster <[email protected]> (@makuk66)
 # maintainer: Shalin Mangar <[email protected]> (@shalinmangar)
 
-5.3.1: git://github.com/docker-solr/docker-solr@9a0cda7b3142c6b5f63642e9c8669cf15dad8b3a 5.3
-5.3: git://github.com/docker-solr/docker-solr@9a0cda7b3142c6b5f63642e9c8669cf15dad8b3a 5.3
-5: git://github.com/docker-solr/docker-solr@9a0cda7b3142c6b5f63642e9c8669cf15dad8b3a 5.3
-latest: git://github.com/docker-solr/docker-solr@9a0cda7b3142c6b5f63642e9c8669cf15dad8b3a 5.3
+5.3.1: git://github.com/docker-solr/docker-solr@d716be08247ec27461d1d22c21d9909edfa46bbd 5.3
+5.3: git://github.com/docker-solr/docker-solr@d716be08247ec27461d1d22c21d9909edfa46bbd 5.3
+5: git://github.com/docker-solr/docker-solr@d716be08247ec27461d1d22c21d9909edfa46bbd 5.3
+latest: git://github.com/docker-solr/docker-solr@d716be08247ec27461d1d22c21d9909edfa46bbd 5.3