Remove --rm from docker run commands

Trying to avoid "Failed to destroy btrfs snapshot" errors on CircleCI

test/docker.bats

@@ -62,7 +62,7 @@ load test_helpers
 		-v /etc/nginx/certs/ \
 		nginx:latest
 	assert_success
-	run retry 5 1s docker run --rm appropriate/curl --silent --fail --head http://$(docker_ip bats-nginx)/
+	run retry 5 1s docker run appropriate/curl --silent --fail --head http://$(docker_ip bats-nginx)/
 	assert_output -l 0 $'HTTP/1.1 200 OK\r'
 
 	# WHEN docker-gen runs on our docker host

test/lib/docker_helpers.bash

@@ -56,5 +56,5 @@ function docker_tcp {
 		--expose 2375 \
 		-v /var/run/docker.sock:/var/run/docker.sock \
 		rancher/socat-docker
-	docker run --rm --link "$container_name:docker" docker version
+	docker run --link "$container_name:docker" docker version
 }

test/test_helpers.bash

@@ -66,7 +66,7 @@ function curl_container {
 	local -r container=$1
 	local -r path=$2
 	shift 2
-	docker run --rm appropriate/curl --silent \
+	docker run appropriate/curl --silent \
 		--connect-timeout 5 \
 		--max-time 20 \
 		"$@" \
@@ -123,7 +123,7 @@ function prepare_web_container {
 	# THEN querying directly port works
 	IFS=$' \t\n' # See https://github.com/sstephenson/bats/issues/89
 	for port in $ports; do
-		run retry 5 1s docker run --rm appropriate/curl --silent --fail http://$(docker_ip $container_name):$port/data
+		run retry 5 1s docker run appropriate/curl --silent --fail http://$(docker_ip $container_name):$port/data
 		assert_output "answer from port $port"
 	done
 }