LUCENE-6380: Fix imports in addVersion.py for the release process (merge from branch_5x)
LUCENE-6380: Fix imports in addVersion.py for the release process (merge from branch_5x)

git-svn-id: cdcdb1bf52d547e50bc31986fc5c1aef5e5ac1ac@1670254 13f79535-47bb-0310-9956-ffa450edef68

PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr,PATRIC3/p3_solr