Solr 5 incompatible schema.xml
On Centos systems Solr assumes your cores will be stored in /var/solr/data/[core-name].

So if your core is named my-core, Solr might already have created the folder /var/solr/data/my-core for you. Simply place the conf directory in that folder, overwriting anything that might already be in conf.
No need to touch any of the other files.