packaging: spec: add dist tag to release
packaging: spec: add dist tag to release

previously the rpm package was distribution agnostic.

See also: https://fedoraproject.org/wiki/Packaging:DistTag#Do_I_Have_To_Use_the_Dist_Tag.3F

Change-Id: I0312261a2587031f70ab3bafa2629643bbe2fac7
Signed-off-by: Sandro Bonazzola <fcb014d63786651910af5db2ecc5316c668188ef@redhat.com>

oVirt/ovirt-jboss-modules-maven-plugin,oVirt/ovirt-jboss-modules-maven-plugin