Use "platform:rhel-8" in bindep to specify it is RHEL8

Change-Id: I45de6aebdcfa2d131097f03cfd51b22a6c156f76

bindep.txt

@@ -1,25 +1,26 @@
 # This file contains runtime (non-python) dependencies
 # More info at: https://docs.openstack.org/infra/bindep/readme.html
 
-gcc [platform:rpm]
-gcc [platform:dpkg]
-
-git [platform:dpkg]
-git [platform:rpm]
-
-iproute [platform:rpm]
-
-libffi-devel [platform:rpm]
-libffi-dev [platform:dpkg]
-
-openssl-devel [platform:rpm]
-libssl-dev [platform:dpkg]
-
-python3 [platform:rpm]
-python3 [platform:dpkg]
-
-python3-devel [platform:rpm]
-python3-dev [platform:dpkg]
-
-python3-libselinux [platform:rpm rhel8]
-libselinux-python [platform:rpm !rhel8]
+# All Linux
+gcc []
+git []
+python3 []
+
+# Red Hat
+iproute [platform:redhat]
+libffi-devel [platform:redhat]
+openssl-devel [platform:redhat]
+python3-devel [platform:redhat]
+
+# Ubuntu
+libffi-dev [platform:ubuntu]
+libssl-dev [platform:ubuntu]
+python3-dev [platform:ubuntu]
+
+# RHEL/CentOS 7
+libselinux-python [platform:rhel-7]
+libselinux-python [platform:centos-7]
+
+# RHEL/CentOS 8
+python3-libselinux [platform:rhel-8]
+python3-libselinux [platform:centos-8]

zuul.d/unit.yaml

@@ -24,8 +24,6 @@
     name: tobiko-tox-py36-centos-8
     parent: tobiko-tox-py36-base
     nodeset: centos-8
-    vars:
-      bindep_profile: test py36 rhel8
 
 
 - job:
@@ -54,5 +52,3 @@
     name: tobiko-tox-py38-centos-8
     parent: tobiko-tox-py38-base
     nodeset: centos-8
-    vars:
-      bindep_profile: test py38 rhel8