Add rhel_family10?

Differential Revision: D73557075

fbshipit-source-id: 44688cb48350c27792396a8fb4ab8fe73e813a7b

Author: yee-unit

cookbooks/fb_helpers/libraries/node_methods.rb

@@ -95,6 +95,10 @@ def rhel_family9?
       self.rhel_family? && self['platform_version'].start_with?('9')
     end
 
+    def rhel_family10?
+      self.rhel_family? && self['platform_version'].start_with?('10')
+    end
+
     def rhel?
       self.rhel_family?
     end