Allow CloudSolrServer and SolrCmdDistributor to use JavaBin.
SolrCloud doesn't distribute null values
Commit 1533686 from Mark Miller in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1533686 ]
SOLR-5223: SolrCloud should use the JavaBin binary format for communication by default.
Commit 1533684 from Mark Miller in branch 'dev/trunk'
[ https://svn.apache.org/r1533684 ]
Patch includes fix for the above mentioned bug.
Problem was that you would get a class cast exception - got map, expected long.
This has exposed an issue with SOLR-3249 - it was not properly handling versions on deletes when using JavaBin.
Simple patch now that SOLR-3249 is done.