t9142: Move call to start_httpd into the setup test
t9142: Move call to start_httpd into the setup test

In addition to being more consistent with the other calls to
start_httpd in tests t9115-*.sh, t9118-*.sh and t9120-*.sh, this
has the added benefit of making the test less noisy. (start_httpd
writes "SVN_HTTPD_PORT is not defined!" on stderr.)

Signed-off-by: Ramsay Jones <3e74413778ce9c8bebbbaedfd56741f6850faeaf@ramsay1.demon.co.uk>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git