HAWQ-1743. Fix download link for tomcat 7
HAWQ-1743. Fix download link for tomcat 7

jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq