D-Net

this branch uses solr 4.3.1 instead of dnet-parent property apache.solr.version being equal to 4.9

counter-fix:
isStored depend only on @stored attribute.

unless specified in the index layout schema stored is opt-out:
default to false in order to save space in the response message.

fix:
if the index metadata format xml states
"result=true" the field has stored="true" in SOLR
else
"result=false" the field has stored="false" in SOLR