Set permission in debian postinst script correctly
Set permission in debian postinst script correctly

The old post installation script on debian set all data to
644 inside of /etc/elasticsearch, which does not work, when
there are subdirectories

Closes #3820

vorce/es-metrics,fubuki/elasticsearch,fubuki/elasticsearch,vorce/es-metrics,fubuki/elasticsearch,aparo/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,vorce/es-metrics,aparo/elasticsearch,fubuki/elasticsearch,vorce/es-metrics,vorce/es-metrics,aparo/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch