Add an end-to-end test for container run

for testing attach, remove, and pull image when missing.

Signed-off-by: Daniel Nephin <dnephin@docker.com>

scripts/test/e2e/run

@@ -39,11 +39,12 @@ function cleanup {
 function runtests {
     local engine_host=$1
 
+    # shellcheck disable=SC2086
     env -i \
         TEST_DOCKER_HOST="$engine_host" \
         GOPATH="$GOPATH" \
         PATH="$PWD/build/" \
-        "$(which go)" test -v ./e2e/...
+        "$(which go)" test -v ./e2e/... ${TESTFLAGS-}
 }
 
 export unique_id="${E2E_UNIQUE_ID:-cliendtoendsuite}"

scripts/test/e2e/wrapper

@@ -27,6 +27,7 @@ testexit=0
 docker run -i --rm \
     -v "$PWD:/go/src/github.com/docker/cli" \
     --network "${unique_id}_default" \
+    -e TESTFLAGS \
     "$dev_image" \
     ./scripts/test/e2e/run test "$engine_host" || testexit="$?"
 run_in_env cleanup