test-federation.sh: Make use of WHAT consistent with make test

test-integration.sh was using the first positional arg passed to WHAT
to filter the list of integration test packages.  This change switches
to passing WHAT verbatim to be consistent with how make test works.

hack/make-rules/test-integration.sh

@@ -41,7 +41,7 @@ KUBE_TEST_ARGS=${KUBE_TEST_ARGS:-}
 kube::test::find_integration_test_dirs() {
   (
     cd ${KUBE_ROOT}
-    find test/integration/${1-} -name '*_test.go' -print0 \
+    find test/integration/ -name '*_test.go' -print0 \
       | xargs -0n1 dirname | sed "s|^|${KUBE_GO_PACKAGE}/|" \
       | LC_ALL=C sort -u
   )
@@ -67,7 +67,7 @@ runTests() {
   # TODO: Re-enable race detection when we switch to a thread-safe etcd client
   # KUBE_RACE="-race"
   make -C "${KUBE_ROOT}" test \
-      WHAT="$(kube::test::find_integration_test_dirs ${2-} | paste -sd' ' -) $(echo ${@:3})" \
+      WHAT="${WHAT:-$(kube::test::find_integration_test_dirs | paste -sd' ' -)}" \
       KUBE_GOFLAGS="${KUBE_GOFLAGS:-} -tags 'integration no-docker'" \
       KUBE_TEST_ARGS="${KUBE_TEST_ARGS:-} ${SHORT:--short=true} --vmodule=garbage*collector*=6 --alsologtostderr=true" \
       KUBE_RACE="" \
@@ -96,20 +96,8 @@ if [[ -n "${KUBE_TEST_ARGS}" ]]; then
   exit 0
 fi
 
-# Pass arguments that begin with "-" and move them to goflags.
-what_flags=()
-for arg in "$@"; do
-  if [[ "${arg}" == -* ]]; then
-    what_flags+=("${arg}")
-  fi
-done
-if [[ "${#what_flags[@]}" -eq 0 ]]; then
-  what_flags=''
-fi
-
-
 # Convert the CSV to an array of API versions to test
 IFS=';' read -a apiVersions <<< "${KUBE_TEST_API_VERSIONS}"
 for apiVersion in "${apiVersions[@]}"; do
-  runTests "${apiVersion}" "${1-}" "${what_flags[@]}"
+  runTests "${apiVersion}"
 done