Revert "Move Fedora 24 to experimental"

This reverts commit e6b8c5c8bb.

Fedora (and centos) builds have been fixed by
I24ce648485c3d6f3c27ab8f87a638516b3727017 and there are ready nodes
now.

Change-Id: Ie5f6fe8c9b2a7e741a5b7530c0193dab5ac711cb

zuul/layout.yaml

@@ -1023,6 +1023,7 @@ project-templates:
       - gate-infra-puppet-apply-ubuntu-trusty
       - gate-infra-puppet-apply-ubuntu-xenial
       - gate-infra-puppet-apply-fedora-23
+      - gate-infra-puppet-apply-fedora-24
       - gate-openstackci-beaker-centos-7
       - gate-openstackci-beaker-ubuntu-trusty
     gate:
@@ -1034,8 +1035,6 @@ project-templates:
       - gate-infra-puppet-apply-fedora-23
       - gate-openstackci-beaker-centos-7
       - gate-openstackci-beaker-ubuntu-trusty
-    experimental:
-      - gate-infra-puppet-apply-fedora-24
 
   - name: infra-logstash-filter-jobs
     check:
@@ -3583,6 +3582,7 @@ projects:
       - gate-grenade-dsvm-neutron-multinode-ubuntu-trusty
       - gate-grenade-dsvm-neutron-multinode-ubuntu-xenial
       - gate-tempest-dsvm-platform-centos7-nv
+      - gate-tempest-dsvm-platform-fedora24-nv
     gate:
       - gate-devstack-docs-ubuntu-xenial
       - gate-devstack-bashate
@@ -3604,7 +3604,6 @@ projects:
       - gate-grenade-dsvm-forward
       - gate-tempest-dsvm-smoke-tlsproxy
       - gate-tempest-dsvm-lvm-multibackend
-      - gate-tempest-dsvm-platform-fedora24-nv
     periodic:
       - propose-devstack-plugins-list
       - periodic-tempest-dsvm-oslo-latest-full-master