Rename xref-query-replace to xref-query-replace-in-results

Rename xref-query-replace to xref-query-replace-in-results

* lisp/progmodes/xref.el(xref-query-replace):
Rename to xref-query-replace-in-results.
(http://lists.gnu.org/archive/html/emacs-devel/2016-01/msg01240.html)

* lisp/progmodes/xref.el (xref--xref-buffer-mode-map):
* lisp/dired-aux.el (dired-do-find-regexp-and-replace):
* doc/emacs/dired.texi (Operating on Files):
* doc/emacs/maintaining.texi (Xref Commands)
(Identifier Search, Identifier Search): Update accordingly.