Fix croneval script to respect CONF_DIR
Fix croneval script to respect CONF_DIR

This commit fixes the croneval script to respect the CONF_DIR
environment variable used to locate the configuration directory.

Original commit: elastic/x-pack-elasticsearch@79974947f9bc7a3193e1b14373c46319d949af95

gfyoung/elasticsearch,GlenRSmith/elasticsearch,vroyer/elassandra,nknize/elasticsearch,strapdata/elassandra,GlenRSmith/elasticsearch,robin13/elasticsearch,strapdata/elassandra,HonzaKral/elasticsearch,gingerwizard/elasticsearch,scorpionvicky/elasticsearch,uschindler/elasticsearch,uschindler/elasticsearch,robin13/elasticsearch,coding0011/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,gingerwizard/elasticsearch,strapdata/elassandra,gfyoung/elasticsearch,vroyer/elassandra,gingerwizard/elasticsearch,GlenRSmith/elasticsearch,gingerwizard/elasticsearch,HonzaKral/elasticsearch,gingerwizard/elasticsearch,robin13/elasticsearch,nknize/elasticsearch,strapdata/elassandra,gfyoung/elasticsearch,gingerwizard/elasticsearch,vroyer/elassandra,gfyoung/elasticsearch,scorpionvicky/elasticsearch,HonzaKral/elasticsearch,coding0011/elasticsearch,HonzaKral/elasticsearch,nknize/elasticsearch,scorpionvicky/elasticsearch,uschindler/elasticsearch,coding0011/elasticsearch,gingerwizard/elasticsearch,uschindler/elasticsearch,GlenRSmith/elasticsearch,coding0011/elasticsearch,strapdata/elassandra,uschindler/elasticsearch,gfyoung/elasticsearch,scorpionvicky/elasticsearch,nknize/elasticsearch,scorpionvicky/elasticsearch,coding0011/elasticsearch