This PR moves the examples test to where it belongs and also include the
following improvements:
- Removed test cases defined for non-existent files;
- Add guard against ineffective tests against missing files;
- Remove the special case for scheduler-policy-config which is no longer
an example, the dependency on the related go module is thus
eliminated;
- Updated the .tavis.yml file to use the new test case: the instruction
sequence is adjusted to ensure the correct version of kubernetes is
fully prepared before we do `go get -v -t`.
- The examples_test.go is formatted using `gofmt`;
- Verbose output during test has been added.
- A separate test case is added for CN translation.
Related: #9285
Qiming