Fix for upload unittest.
Removed deprecated waitFlush option in SOLR.

This will enable Solr version 4 for MediaMosa.
Merge pull request #138 from arjenk/bugfix/upload-unittest

Your pull request has been merged, thank you bro.
Merge pull request #139 from arjenk/feature/enable-solr4

Your pull request has been merged, thank you bro.
Updated SDK to latest, please run 'git submodule update'.
Version 3.5.1-dev build 2105.