Configure DNF on Arista EOS 4.31+

Differential Revision: D54747272

fbshipit-source-id: fb45b067dbd6f408ed50d2921a2738713079bee9

cookbooks/fb_helpers/README.md

@@ -240,6 +240,9 @@ your node.
 * `node.aristaeos_4_28_or_newer?`
     Is network switch running Arista EOS and OS version is 4.28 or newer
 
+* `node.aristaeos_4_31_or_newer?`
+    Is network switch running Arista EOS and OS version is 4.31 or newer
+
 * `node.embedded?`
     Is embedded Linux, implies 'node.aristaeos?'. These devices likely have
     minimal packages installed, little space, and/or some non-persistent

cookbooks/fb_helpers/libraries/node_methods.rb

@@ -532,6 +532,10 @@ def aristaeos_4_28_or_newer?
       self.aristaeos? && self._self_version >= self._canonical_version('4.28')
     end
 
+    def aristaeos_4_31_or_newer?
+      self.aristaeos? && self._self_version >= self._canonical_version('4.31')
+    end
+
     def embedded?
       self.aristaeos?
     end
@@ -1026,7 +1030,7 @@ def filesystem_data
     # returns the version-release of an rpm installed, or nil if not present
     def rpm_version(name)
       if (self.centos? && !self.centos7?) || self.fedora? || self.redhat8? || self.oracle8? || self.redhat9? ||
-        self.oracle9?
+        self.oracle9? || self.aristaeos_4_31_or_newer?
         # returns epoch.version
         v = Chef::Provider::Package::Dnf::PythonHelper.instance.
             package_query(:whatinstalled, name).version