bad testRetry in cppunit tests (hudson failure)

                 Key: ZOOKEEPER-460
             Project: Zookeeper
          Issue Type: Bug
          Components: c client, tests
            Reporter: Patrick Hunt
            Assignee: Henry Robinson
             Fix For: 3.2.1, 3.3.0

the followng code failed on hudson

      watchctx_t ctx1, ctx2;
      zhandle_t *zk1 = createClient(&ctx1);
      CPPUNIT_ASSERT_EQUAL(true, ctx1.waitForConnected(zk1));
      zhandle_t *zk2 = createClient(&ctx2);
      CPPUNIT_ASSERT_EQUAL(true, ctx2.waitForConnected(zk2));

there's a problem with this test, it assumes that close(1) can be called before 
createclient(2) gets connected.

this is not correct: createclient is an async call an in some cases the 
connection can be established before
create client returns.

this shows a failure in this case because client1 was created, then client2 
attempted to connect
but failed due to this on the server (max conn exceeded):
        sprintf(cmd, "export ZKMAXCNXNS=1;%s startClean %s", ZKSERVER_CMD, 

conn 2 failed and therefore the following assert eventually failed.

this code should not assume that close(1) will beat connect(2)

Henry can you take a look?

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