1) removing some additional lib copying yonik seems to have     missed in r791147 2) setting some props on the lib dir so download jars are     ignored 3) tweaking clean-downloads so it's less brittle to rev'ing     downloads in the future (multiple versions might have    been left in lib accidently)    
1) removing some additional lib copying yonik seems to have 
   missed in r791147
2) setting some props on the lib dir so download jars are 
   ignored
3) tweaking clean-downloads so it's less brittle to rev'ing 
   downloads in the future (multiple versions might have
   been left in lib accidently)
   




git-svn-id: 3b1ff1236863b4d63a22e4dae568675c2e247730@792724 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr