copr-dist-git: use dnf ansible module instead of yum

roles/copr/dist_git/tasks/main.yml

@@ -4,7 +4,7 @@
 #- copy: src="dist-git-epel-7.repo" dest="/etc/yum.repos.d/"
 
 - name: install packages
-  yum: state=present name={{ item }}
+  dnf: state=present name={{ item }}
   with_items:
   #- epel-release
   - cgit
@@ -28,7 +28,7 @@
 # - file: path="/var/lib/dist-git/git/rpms/" state=directory group=packager
 
 - name: install packages which should be added as requirements
-  yum: state=present name={{ item }}
+  dnf: state=present name={{ item }}
   with_items:
   - pyrpkg