ISSUE-4884: BasicEndToEndTest is flaky

[sijie]

Original Issue: apache#4884

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2019-08-03 22:06:29.555 INFO  ProducerImpl:467 | Producer - [non-persistent://public/default/testNonPersistentTopic, ] , [batchMessageContainer = { BatchContainer [size = 0] [batchSizeInBytes_ = 0] [maxAllowedMessageBatchSizeInBytes_ = 131072] [maxAllowedNumMessagesInBatch_ = 1000] [topicName = non-persistent://public/default/testNonPersistentTopic] [producerName_ = ] [batchSizeInBytes_ = 0] [numberOfBatchesSent = 0] [averageBatchSize = 0]}]
2019-08-03 22:06:29.555 INFO  BatchMessageContainer:171 | [numberOfBatchesSent = 0] [averageBatchSize = 0]
/pulsar/pulsar-client-cpp/tests/BasicEndToEndTest.cc:296: Failure
Value of: result
  Actual: TimeOut
Expected: ResultOk
Which is: Ok
�[0;31m[  FAILED  ] �[mBasicEndToEndTest.testNonPersistentTopic (30782 ms)
�[0;32m[----------] �[m1 test from BasicEndToEndTest (30782 ms total)

�[0;32m[----------] �[mGlobal test environment tear-down
�[0;32m[==========] �[m1 test from 1 test case ran. (30784 ms total)
�[0;32m[  PASSED  ] �[m0 tests.
�[0;31m[  FAILED  ] �[m1 test, listed below:
�[0;31m[  FAILED  ] �[mBasicEndToEndTest.testNonPersistentTopic

 1 FAILED TEST
[35/154] BasicEndToEndTest.testNonPersistentTopic returned/aborted with exit code 1 (30806 ms)
[36/154] BasicEndToEndTest.testNonExistingTopic (30806 ms)
[37/154] BasicEndToEndTest.testBatchMessages (30883 ms)
�[0;33mNote: Google Test filter = BasicEndToEndTest.testBatchMessages
�[m�[0;32m[==========] �[mRunning 1 test from 1 test case.
�[0;32m[----------] �[mGlobal test environment set-up.
�[0;32m[----------] �[m1 test from BasicEndToEndTest
�[0;32m[ RUN      ] �[mBasicEndToEndTest.testBatchMessages
2019-08-03 22:05:58.758 INFO  ConnectionPool:72 | Created connection for pulsar://localhost:6650
2019-08-03 22:05:58.775 INFO  ClientConnection:324 | [127.0.0.1:54404 -> 127.0.0.1:6650] Connected to broker
2019-08-03 22:05:59.178 INFO  BatchMessageContainer:43 | { BatchContainer [size = 0] [batchSizeInBytes_ = 0] [maxAllowedMessageBatchSizeInBytes_ = 131072] [maxAllowedNumMessagesInBatch_ = 2] [topicName = persistent://public/default/test-batch-messages] [producerName_ = ] [batchSizeInBytes_ = 0] [numberOfBatchesSent = 0] [averageBatchSize = 0]} BatchMessageContainer constructed
2019-08-03 22:05:59.178 INFO  HandlerBase:52 | [persistent://public/default/test-batch-messages, ] Getting connection from pool
2019-08-03 22:06:29.591 ERROR ProducerImpl:216 | [persistent://public/default/test-batch-messages, ] Failed to create producer: TimeOut
2019-08-03 22:06:29.617 INFO  ProducerImpl:467 | Producer - [persistent://public/default/test-batch-messages, ] , [batchMessageContainer = { BatchContainer [size = 0] [batchSizeInBytes_ = 0] [maxAllowedMessageBatchSizeInBytes_ = 131072] [maxAllowedNumMessagesInBatch_ = 2] [topicName = persistent://public/default/test-batch-messages] [producerName_ = ] [batchSizeInBytes_ = 0] [numberOfBatchesSent = 0] [averageBatchSize = 0]}]
2019-08-03 22:06:29.617 INFO  BatchMessageContainer:171 | [numberOfBatchesSent = 0] [averageBatchSize = 0]
/pulsar/pulsar-client-cpp/tests/BasicEndToEndTest.cc:160: Failure
Value of: result
  Actual: TimeOut
Expected: ResultOk
Which is: Ok
�[0;31m[  FAILED  ] �[mBasicEndToEndTest.testBatchMessages (30860 ms)
�[0;32m[----------] �[m1 test from BasicEndToEndTest (30860 ms total)

�[0;32m[----------] �[mGlobal test environment tear-down
�[0;32m[==========] �[m1 test from 1 test case ran. (30860 ms total)
�[0;32m[  PASSED  ] �[m0 tests.
�[0;31m[  FAILED  ] �[m1 test, listed below:
�[0;31m[  FAILED  ] �[mBasicEndToEndTest.testBatchMessages

 1 FAILED TEST