add missing stream wrapper functions

[p8nut]

Issue #, if available:
#2954
Description of changes:
this implement the missing functions from the stream wrapper interface.
all of the missing function return false as the doc describe.
if needed it also throw an E_WARNING

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[stobrien89]

Hi @p8nut,

Thanks for the contribution. Would you be able to to add some unit tests covering this behavior in Test\S3\StreamWrapperTest ? Nothing fancy, just assertions on the output.

[p8nut]

as asked i try to add some basic test to the code but for some reason i wasn't able to try them on my computer.
i leave them here for now and will try to validate all of them as soon as possible.

[stobrien89]

@p8nut,

Thanks for adding the tests. Just two things:

1. for the test methods, can you append ReturnsFalse to their names? e.g. testSetStreamOptionReturnsFalse.
2. The tests are failing because the mock request is not returning a mock result. You can fix this by adding

$this->addMockResults(
  $this->client,
  [
      new Result(),
  ]
);

prior to $stream = ... in your tests.