Ignore /etc/mime.types access by Python itself

Discovered as part of the investigation into #9271 .

re: #9272
pulpcore-selinux needs SELinux changes for systemd Type=notify
https://pulp.plan.io/issues/9272

[noissue]

pulpcore.te

@@ -1,5 +1,10 @@
 policy_module(pulpcore, 1.2.4)
 
+require {
+	type httpd_config_t;
+	class dir search;
+}
+
 ########################################
 #
 # Declarations
@@ -141,6 +146,10 @@ miscfiles_read_generic_certs(pulpcore_t)
 
 sysnet_read_config(pulpcore_t)
 
+# Attempts to read the non-existent /etc/httpd/mime.types with Katello on EL7
+# Occurs whenever mailcap isn't installed, which would provide /etc/mime.types
+dontaudit pulpcore_server_t httpd_config_t:dir search;
+
 optional_policy(`
         gpg_exec(pulpcore_t)
 ')