Once again, use native Ginkgo test runner instead of cmd/e2e.

This commit deletes cmd/e2e and updates hack/ginkgo-e2e.sh to use the
'ginkgo' command instead. All logic from cmd/e2e/e2e.go and
test/e2e/driver.go have been combined into the new file
test/e2e/e2e_test.go.

The test tarball now includes a built version of the test/e2e test
binary, which includes all tests under test/e2e. This was accomplished
by updating the build scripts to use 'go test -c' when a target name
ended with '.test', and adding a dependency on test/e2e/e2e.test.

This prebuilt test binary is passed to the Ginkgo runner in
hack/ginkgo-e2e.sh. In a future change, we can add support to run
Ginkgo against the source tree if it is available.

This change is generally intended to have no externally visible changes,
aside from the following caveats:
 - The -t/--tests flag has been removed
 - Calling cmd/e2e/e2e directly obviously won't work, but that was never
   intended to be supported anyway
 - If the GINKGO_PARALLEL environment variable is set to y, then ginkgo
   will run test specs in parallel. (Currently defaults to n, since some
   tests are broken in this mode.)

Additionally, several tests which made poor assumptions about cwd or
used testContext before it had been set have been fixed.

hack/ginkgo-e2e.sh

@@ -18,54 +18,18 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
+GINKGO_PARALLEL=${GINKGO_PARALLEL:-n} # set to 'y' to run tests in parallel
+KUBE_ROOT=$(readlink -f $(dirname "${BASH_SOURCE}")/..)
+
 source "${KUBE_ROOT}/cluster/common.sh"
+source "${KUBE_ROOT}/hack/lib/init.sh"
 
-# --- Find local test binaries.
-
-# Detect the OS name/arch so that we can find our binary
-case "$(uname -s)" in
-  Darwin)
-    host_os=darwin
-    ;;
-  Linux)
-    host_os=linux
-    ;;
-  *)
-    echo "Unsupported host OS.  Must be Linux or Mac OS X." >&2
-    exit 1
-    ;;
-esac
-
-case "$(uname -m)" in
-  x86_64*)
-    host_arch=amd64
-    ;;
-  i?86_64*)
-    host_arch=amd64
-    ;;
-  amd64*)
-    host_arch=amd64
-    ;;
-  arm*)
-    host_arch=arm
-    ;;
-  i?86*)
-    host_arch=x86
-    ;;
-  *)
-    echo "Unsupported host arch. Must be x86_64, 386 or arm." >&2
-    exit 1
-    ;;
-esac
-
-# Gather up the list of likely places and use ls to find the latest one.
-locations=(
-  "${KUBE_ROOT}/_output/dockerized/bin/${host_os}/${host_arch}/e2e"
-  "${KUBE_ROOT}/_output/local/bin/${host_os}/${host_arch}/e2e"
-  "${KUBE_ROOT}/platforms/${host_os}/${host_arch}/e2e"
-)
-e2e=$( (ls -t "${locations[@]}" 2>/dev/null || true) | head -1 )
+# Ginkgo will build the e2e tests, so we need to make sure that the environment
+# is set up correctly (including Godeps, etc).
+kube::golang::setup_env
+# Find the ginkgo binary build as part of the release.
+ginkgo=$(kube::util::find-binary "ginkgo")
+e2e_test=$(kube::util::find-binary "e2e.test")
 
 # --- Setup some env vars.
 
@@ -89,8 +53,8 @@ if [[ -z "${AUTH_CONFIG:-}" ]];  then
 
     if [[ "${KUBERNETES_PROVIDER}" == "conformance_test" ]]; then
       auth_config=(
-        "--auth_config=${KUBERNETES_CONFORMANCE_TEST_AUTH_CONFIG:-}"
-        "--cert_dir=${KUBERNETES_CONFORMANCE_TEST_CERT_DIR:-}"
+        "--auth-config=${KUBERNETES_CONFORMANCE_TEST_AUTH_CONFIG:-}"
+        "--cert-dir=${KUBERNETES_CONFORMANCE_TEST_CERT_DIR:-}"
       )
     else
       auth_config=(
@@ -108,21 +72,26 @@ else
   echo "Conformance Test.  No cloud-provider-specific preparation."
   KUBERNETES_PROVIDER=""
   auth_config=(
-    "--auth_config=${AUTH_CONFIG:-}"
-    "--cert_dir=${CERT_DIR:-}"
+    "--auth-config=${AUTH_CONFIG:-}"
+    "--cert-dir=${CERT_DIR:-}"
   )
 fi
 
-# Use the kubectl binary from the same directory as the e2e binary.
+ginkgo_args=()
+if [[ ${GINKGO_PARALLEL} =~ ^[yY]$ ]]; then
+  ginkgo_args+=("-p")
+fi
+
 # The --host setting is used only when providing --auth_config
 # If --kubeconfig is used, the host to use is retrieved from the .kubeconfig
 # file and the one provided with --host is ignored.
-export PATH=$(dirname "${e2e}"):"${PATH}"
-"${e2e}" "${auth_config[@]:+${auth_config[@]}}" \
+"${ginkgo}" "${ginkgo_args[@]:+${ginkgo_args[@]}}" "${e2e_test}" -- \
+  "${auth_config[@]:+${auth_config[@]}}" \
   --host="https://${KUBE_MASTER_IP-}" \
   --provider="${KUBERNETES_PROVIDER}" \
-  --gce_project="${PROJECT:-}" \
-  --gce_zone="${ZONE:-}" \
-  --kube_master="${KUBE_MASTER:-}" \
-  ${E2E_REPORT_DIR+"--report_dir=${E2E_REPORT_DIR}"} \
+  --gce-project="${PROJECT:-}" \
+  --gce-zone="${ZONE:-}" \
+  --kube-master="${KUBE_MASTER:-}" \
+  --repo-root="${KUBE_VERSION_ROOT}" \
+  ${E2E_REPORT_DIR+"--report-dir=${E2E_REPORT_DIR}"} \
   "${@:-}"