examples: rbd/storageclass.yaml causes Python excetion with yamllint
examples: rbd/storageclass.yaml causes Python excetion with yamllint

While running the 'make test' target and have 'yamllint' available, the
test fails with the following exception:

yamllint -s -d {extends: default, rules: {line-length: {allow-non-breakable-inline-mappings: true}},ignore: charts/*/templates/*.yaml} ./examples/rbd/storageclass.yaml
Traceback (most recent call last):
  File "/usr/local/bin/yamllint", line 11, in <module>
    sys.exit(run())
  File "/usr/local/lib/python3.6/site-packages/yamllint/cli.py", line 181, in run
    problems = linter.run(f, conf, filepath)
  File "/usr/local/lib/python3.6/site-packages/yamllint/linter.py", line 237, in run
    content = input.read()
  File "/usr/lib64/python3.6/encodings/ascii.py", line 26, in decode
    return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 1947: ordinal not in range(128)

The quotes used in the comments seem to be non-ascii characters.
Replacing these with standard " makes the test pass again.

This problem occurred while running tests in a container based on the
Ceph image (CentOS-7) with Python 3. Travis CI might still use Python 2
for yamllint, and hide the problem.

Signed-off-by: Niels de Vos <7bda0c0ee7f47171cc808e9e60292cbc5d8140dd@redhat.com>

ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi,ceph/ceph-csi