build: fix the artifactId in the pom for x-pack-transport
build: fix the artifactId in the pom for x-pack-transport

This changes the pom generation to use the value of archivesBaseName when generating
the pom file.

Closes elastic/elasticsearch#3668

Original commit: elastic/x-pack-elasticsearch@a6e537cffeffcec391743148c05f487b82e8e012

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