[test] add lucene expressions jar as test dependency
[test] add lucene expressions jar as test dependency

REST tests that use expressions as the script language requires the
lucene-expressions library to be loaded.

Original commit: elastic/x-pack-elasticsearch@c0f2b8a4b27d21eebae5fc35d745dfea1aa57303

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