e2e-tests: Fix ginkgo.focus example
e2e-tests: Fix ginkgo.focus example

The extra quotation marks around "Service" are preserved by e2e.go and
e2e.sh and thus cause Ginkgo to skip all tests. It's safe to only
quote just the parameter value for e2e.go, so for example this works
despite the special character:

   --test_args="--ginkgo.focus=Secrets|Secrets"

pwittrock/community,bgrant0607/community,kubernetes/community,kubernetes/community,bgrant0607/community,kubernetes/community,pwittrock/community