Simplify Tramp caching

* lisp/net/tramp-cache.el (tramp-flush-file-upper-properties)
(tramp-flush-directory-properties)
(tramp-flush-connection-properties, tramp-list-connections)
(tramp-parse-connection-properties):
* lisp/net/tramp-gvfs.el (tramp-parse-goa-accounts)
(tramp-parse-media-names): Simplify cache handling.
1 job for master in 58 minutes and 44 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #4994
test-all

00:58:44