(SIMP-10204) Ensure testing with CentOS 8.4 (#28)

- update the EL8 nodes in the acceptance tests
  to run with generic/centos8 to make sure they using
  CentOS 8.4
- remove epel repo from nodeset. Epel repo is installed by
  simp beaker helpers.

SIMP-10204 #comment update rkhunter
SIMP-10238 #close

spec/acceptance/nodesets/default.yml

@@ -10,13 +10,9 @@ HOSTS:
     roles:
       - client
     platform:   el-8-x86_64
-    box:        centos/8
+    box:        generic/centos8
     hypervisor: <%= hypervisor %>
-    yum_repos:
-      epel:
-        mirrorlist: 'https://mirrors.fedoraproject.org/metalink?repo=epel-8&arch=$basearch'
-        gpgkeys:
-          - https://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-$releasever
+
   el7:
     roles:
       - default
@@ -25,11 +21,7 @@ HOSTS:
     platform:   el-7-x86_64
     box:        centos/7
     hypervisor: <%= hypervisor %>
-    yum_repos:
-      epel:
-        mirrorlist: 'https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch'
-        gpgkeys:
-          - https://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-$releasever
+
 CONFIG:
   log_level: verbose
   type: aio

spec/acceptance/nodesets/oel.yml

@@ -12,11 +12,7 @@ HOSTS:
     platform:   el-8-x86_64
     box:       generic/oracle8
     hypervisor: <%= hypervisor %>
-    yum_repos:
-      epel:
-        mirrorlist: 'https://mirrors.fedoraproject.org/metalink?repo=epel-8&arch=$basearch'
-        gpgkeys:
-          - https://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-$releasever
+
   oel7:
     roles:
       - default
@@ -25,11 +21,7 @@ HOSTS:
     platform:   el-7-x86_64
     box:        generic/oracle7
     hypervisor: <%= hypervisor %>
-    yum_repos:
-      epel:
-        mirrorlist: 'https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=$basearch'
-        gpgkeys:
-          - https://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-$releasever
+
 CONFIG:
   log_level: verbose
   type: aio