SOLR-5395: add RunAlways marker interface for update processor facctories

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1536341 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5395: add RunAlways marker interface for update processor facctories

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1536344 13f79535-47bb-0310-9956-ffa450edef68