Fix #830 make portal pom cleanup heroku specific
Fix #830 make portal pom cleanup heroku specific

Currently the temporary built files in `portal/target/portal` are deleted. This
deletes the files only in case the heroku profile is selected.

cBioPortal/cbioportal,adamabeshouse/cbioportal,adamabeshouse/cbioportal,inodb/cbioportal,sheridancbio/cbioportal,kalletlak/cbioportal,adamabeshouse/cbioportal,onursumer/cbioportal,angelicaochoa/cbioportal,n1zea144/cbioportal,inodb/cbioportal,inodb/cbioportal,sheridancbio/cbioportal,adamabeshouse/cbioportal,kalletlak/cbioportal,d3b-center/pedcbioportal,inodb/cbioportal,shrumit/cbioportal-gsoc-final,angelicaochoa/cbioportal,mandawilson/cbioportal,mandawilson/cbioportal,IntersectAustralia/cbioportal,kalletlak/cbioportal,adamabeshouse/cbioportal,cBioPortal/cbioportal,IntersectAustralia/cbioportal,pughlab/cbioportal,shrumit/cbioportal-gsoc-final,gsun83/cbioportal,inodb/cbioportal,mandawilson/cbioportal,kalletlak/cbioportal,jjgao/cbioportal,sheridancbio/cbioportal,gsun83/cbioportal,shrumit/cbioportal-gsoc-final,yichaoS/cbioportal,jjgao/cbioportal,gsun83/cbioportal,yichaoS/cbioportal,sheridancbio/cbioportal,mandawilson/cbioportal,bihealth/cbioportal,d3b-center/pedcbioportal,shrumit/cbioportal-gsoc-final,n1zea144/cbioportal,IntersectAustralia/cbioportal,pughlab/cbioportal,pughlab/cbioportal,IntersectAustralia/cbioportal,bihealth/cbioportal,kalletlak/cbioportal,pughlab/cbioportal,IntersectAustralia/cbioportal,cBioPortal/cbioportal,angelicaochoa/cbioportal,zhx828/cbioportal,inodb/cbioportal,onursumer/cbioportal,d3b-center/pedcbioportal,angelicaochoa/cbioportal,yichaoS/cbioportal,jjgao/cbioportal,n1zea144/cbioportal,cBioPortal/cbioportal,mandawilson/cbioportal,kalletlak/cbioportal,bihealth/cbioportal,d3b-center/pedcbioportal,bihealth/cbioportal,n1zea144/cbioportal,jjgao/cbioportal,d3b-center/pedcbioportal,bihealth/cbioportal,inodb/cbioportal,jjgao/cbioportal,jjgao/cbioportal,bihealth/cbioportal,gsun83/cbioportal,gsun83/cbioportal,n1zea144/cbioportal,onursumer/cbioportal,shrumit/cbioportal-gsoc-final,angelicaochoa/cbioportal,yichaoS/cbioportal,yichaoS/cbioportal,shrumit/cbioportal-gsoc-final,cBioPortal/cbioportal,mandawilson/cbioportal,jjgao/cbioportal,bihealth/cbioportal,gsun83/cbioportal,zhx828/cbioportal,pughlab/cbioportal,pughlab/cbioportal,zhx828/cbioportal,zhx828/cbioportal,yichaoS/cbioportal,IntersectAustralia/cbioportal,zhx828/cbioportal,n1zea144/cbioportal,d3b-center/pedcbioportal,shrumit/cbioportal-gsoc-final,angelicaochoa/cbioportal,angelicaochoa/cbioportal,zhx828/cbioportal,onursumer/cbioportal,sheridancbio/cbioportal,pughlab/cbioportal,onursumer/cbioportal,onursumer/cbioportal,kalletlak/cbioportal,gsun83/cbioportal,adamabeshouse/cbioportal,mandawilson/cbioportal,yichaoS/cbioportal,n1zea144/cbioportal,IntersectAustralia/cbioportal,adamabeshouse/cbioportal,sheridancbio/cbioportal,cBioPortal/cbioportal,zhx828/cbioportal,d3b-center/pedcbioportal