Change url of robots.txt test to dockerproject.com

Docker-DCO-1.1-Signed-off-by: Jessica Frazelle <jess@docker.com> (github: jfrazelle)

integration-cli/docker_cli_build_test.go

@@ -737,7 +737,7 @@ RUN mkdir /exists
 RUN touch /exists/exists_file
 RUN chown -R dockerio.dockerio /exists
 COPY test_file1 test_file2 /exists/
-ADD test_file3 test_file4 https://docker.com/robots.txt /exists/
+ADD test_file3 test_file4 https://dockerproject.com/robots.txt /exists/
 RUN [ $(ls -l / | grep exists | awk '{print $3":"$4}') = 'dockerio:dockerio' ]
 RUN [ $(ls -l /exists/test_file1 | awk '{print $3":"$4}') = 'root:root' ]
 RUN [ $(ls -l /exists/test_file2 | awk '{print $3":"$4}') = 'root:root' ]