Modify E2E test config to use correct app dir
Modify E2E test config to use correct app dir

Using /src as an APPDIR value works on development machines, but on
build machines the code is running on the webserver, which means the
APPDIR value should be /htdocs instead.

UpstatePedro/web-languageforge,ermshiperete/web-languageforge,sillsdev/web-scriptureforge,sillsdev/web-scriptureforge,UpstatePedro/web-languageforge,sillsdev/web-cat,sillsdev/web-scriptureforge,UpstatePedro/web-languageforge,ermshiperete/web-languageforge,sillsdev/web-cat,sil-student-projects/web-languageforge,sil-student-projects/web-languageforge,sillsdev/web-scriptureforge,ermshiperete/web-languageforge,UpstatePedro/web-languageforge,sil-jterm-2015/sfwebchecks,sil-student-projects/web-scriptureforge,sil-student-projects/web-languageforge,sil-student-projects/web-scriptureforge,sil-jterm-2015/sfwebchecks,ermshiperete/web-languageforge,sil-student-projects/web-scriptureforge,sil-student-projects/web-languageforge,sillsdev/web-scriptureforge,UpstatePedro/web-languageforge,sil-student-projects/web-scriptureforge,ermshiperete/web-languageforge,sil-student-projects/web-scriptureforge,sil-jterm-2015/sfwebchecks,sillsdev/web-scriptureforge,sil-student-projects/web-scriptureforge,sillsdev/web-scriptureforge,sillsdev/web-cat,sil-student-projects/web-languageforge,sillsdev/web-cat,sil-student-projects/web-languageforge,sil-jterm-2015/sfwebchecks,sil-jterm-2015/sfwebchecks,UpstatePedro/web-languageforge,sil-student-projects/web-languageforge,ermshiperete/web-languageforge,sil-jterm-2015/sfwebchecks,UpstatePedro/web-languageforge,sillsdev/web-cat,sil-student-projects/web-scriptureforge,sillsdev/web-scriptureforge,ermshiperete/web-languageforge,sil-student-projects/web-languageforge,ermshiperete/web-languageforge,sillsdev/web-cat,sillsdev/web-cat,sillsdev/web-cat