RestClientStats tests are failing inconsistently.

[tcard]

From time to time, a RestClientStats test fails with an off-by-one error.

[16:18:08]: ▸ ablySpec.RestClientStats
[16:18:08]: ▸ RestClient__stats__result__should_match_hour_level_inbound_and_outbound_fixture_data__forwards__UserstravisbuildablyablyiosablySpecRestClientstatsswift_160, failed - expected to equal <1>, got <2>
[16:18:08]: ▸ /Users/travis/build/ably/ably-ios/ablySpec/RestClient.stats.swift:181
[16:18:08]: ▸ ```
[16:18:08]: ▸ 
[16:18:08]: ▸                         expect(result.items.count).to(equal(1))
[16:18:08]: ▸                         expect(totalInbound).to(equal(50 + 60 + 70))
[16:18:08]: ▸   ```
[16:18:08]: ▸      Executed 190 tests, with 1 failure (0 unexpected) in 508.631 (509.033) seconds
[16:18:08]: ▸ 

[tcard]

Another failure that has nothing to do with the new code (#144):

[17:08:50]: ▸ ablySpec.RestChannel
[17:08:50]: ▸ presence__get__should_return_presence_fixture_data_UserstravisbuildablyablyiosablySpecRestChannelswift_206, failed - expected to eventually equal <6>, got <0>
[17:08:50]: ▸ /Users/travis/build/ably/ably-ios/ablySpec/RestChannel.swift:216
[17:08:50]: ▸ ```
[17:08:50]: ▸ 
[17:08:50]: ▸                     expect(presenceMessages.count).toEventually(equal(presenceFixtures.count), timeout: testTimeout)
[17:08:50]: ▸                     for message in presenceMessages {
[17:08:50]: ▸   ```
[17:08:50]: ▸      Executed 185 tests, with 1 failure (0 unexpected) in 551.620 (551.911) seconds

This looks like a timeout in Presence.get. testTimeout is 10 s, so it's taking longer than that, which is not good. Maybe it's a problem of Travis itself? The alternative is that something is wrong in realtime.

[tcard]

@ricardopereira Why did you close this? Last time I checked (when trying out #173) it was still happening.

[ricardopereira]

I thought it was fixed.

[tcard]

#278 fixes this.