Add el7 to alternat squashfs name
Add el7 to alternat squashfs name

xcat2/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent