Use slot names rather than their :initargs

Use slot names rather than their :initargs

* test/lisp/emacs-lisp/eieio-tests/eieio-tests.el
(eieio-test-39-clone-instance-inheritor-with-args):

* test/lisp/auth-source-tests.el (auth-source-ensure-ignored-backend)
(auth-source-backend-parse-macos-keychain)
(auth-source-backend-parse-macos-keychain-generic-string)
(auth-source-backend-parse-macos-keychain-internet-string)
(auth-source-backend-parse-macos-keychain-internet-symbol)
(auth-source-backend-parse-macos-keychain-generic-symbol)
(auth-source-backend-parse-macos-keychain-internet-default-string)
(auth-source-backend-parse-plstore, auth-source-backend-parse-netrc)
(auth-source-backend-parse-netrc-string)
(auth-source-backend-parse-secrets)
(auth-source-backend-parse-secrets-strings)
(auth-source-backend-parse-secrets-alias)
(auth-source-backend-parse-secrets-symbol)
(auth-source-backend-parse-secrets-no-alias):
Use slot names rather than their :initargs.

(cherry picked from commit b068725d40dd1ab918178b3cbca7b5672037210f)