Make request-backend configurable in ycmd-ert-deftest
Make request-backend configurable in ycmd-ert-deftest

phst/emacs-ycmd,emacsmirror/ycmd,ptrv/emacs-ycmd,abingham/emacs-ycmd,emacsmirror/ycmd,ptrv/emacs-ycmd,phst/emacs-ycmd,abingham/emacs-ycmd,abingham/emacs-ycmd,abingham/emacs-ycmd,emacsmirror/ycmd,emacsmirror/ycmd,phst/emacs-ycmd,ptrv/emacs-ycmd,emacsmirror/ycmd,ptrv/emacs-ycmd,phst/emacs-ycmd,ptrv/emacs-ycmd,phst/emacs-ycmd,abingham/emacs-ycmd,emacsmirror/ycmd,abingham/emacs-ycmd,phst/emacs-ycmd,ptrv/emacs-ycmd