disable TestQueueDepth due to flakiness

[kirg]

--- FAIL: TestQueueDepth (103.41s)
panic: Fail in goroutine after TestNetIntegrationSuiteParallelA has completed [recovered]
	panic: Fail in goroutine after TestNetIntegrationSuiteParallelA has completed
goroutine 25346 [running]:
panic(0x12c9b40, 0xc423576a80)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/runtime/panic.go:500 +0x1ae
testing.tRunner.func1(0xc421209440)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/testing/testing.go:579 +0x474
panic(0x12c9b40, 0xc423576a80)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/runtime/panic.go:458 +0x271
testing.(*common).Fail(0xc42017e900)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/testing/testing.go:412 +0x182
testing.(*common).Errorf(0xc42017e900, 0xc423957ee0, 0xcf, 0x0, 0x0, 0x0)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/testing/testing.go:484 +0x95
testing.(*T).Errorf(0xc42017e900, 0xc423957ee0, 0xcf, 0x0, 0x0, 0x0)
	<autogenerated>:10 +0x87
github.com/uber/cherami-server/vendor/github.com/stretchr/testify/assert.Fail(0x1cef8e0, 0xc42017e900, 0xc42442bc70, 0x41, 0x0, 0x0, 0x0, 0xc42358f1c0)
	/home/travis/gopath/src/github.com/uber/cherami-server/vendor/github.com/stretchr/testify/assert/assertions.go:226 +0x280
github.com/uber/cherami-server/vendor/github.com/stretchr/testify/assert.NoError(0x1cef8e0, 0xc42017e900, 0x1cf0520, 0xc420074ea0, 0x0, 0x0, 0x0, 0xc420f7b801)
	/home/travis/gopath/src/github.com/uber/cherami-server/vendor/github.com/stretchr/testify/assert/assertions.go:891 +0x12c
github.com/uber/cherami-server/vendor/github.com/stretchr/testify/require.NoError(0x1cf69e0, 0xc42017e900, 0x1cf0520, 0xc420074ea0, 0x0, 0x0, 0x0)
	/home/travis/gopath/src/github.com/uber/cherami-server/vendor/github.com/stretchr/testify/require/require.go:287 +0xa0
github.com/uber/cherami-server/vendor/github.com/stretchr/testify/require.(*Assertions).NoError(0xc4201a69a0, 0x1cf0520, 0xc420074ea0, 0x0, 0x0, 0x0)
	/home/travis/gopath/src/github.com/uber/cherami-server/vendor/github.com/stretchr/testify/require/require_forward.go:237 +0x8c
github.com/uber/cherami-server/test/integration.(*NetIntegrationSuiteParallelB).TestQueueDepth.func6(0x2, 0x0)
	/home/travis/gopath/src/github.com/uber/cherami-server/test/integration/integration_test.go:2417 +0x882
github.com/uber/cherami-server/test/integration.(*NetIntegrationSuiteParallelB).TestQueueDepth(0xc4200a1080)
	/home/travis/gopath/src/github.com/uber/cherami-server/test/integration/integration_test.go:2677 +0x2099
reflect.Value.call(0xc422ed7aa0, 0xc420033618, 0x13, 0x14429cf, 0x4, 0xc42358ff18, 0x1, 0x1, 0xc4200a1080, 0xc420630e30, ...)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/reflect/value.go:434 +0x6d6
reflect.Value.Call(0xc422ed7aa0, 0xc420033618, 0x13, 0xc42358ff18, 0x1, 0x1, 0x123f7df, 0xe, 0x0)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/reflect/value.go:302 +0xc1
github.com/uber/cherami-server/vendor/github.com/stretchr/testify/suite.Run.func2(0xc421209440)
	/home/travis/gopath/src/github.com/uber/cherami-server/vendor/github.com/stretchr/testify/suite/suite.go:101 +0x38a
testing.tRunner(0xc421209440, 0xc421ddbc80)
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/testing/testing.go:610 +0xca
created by testing.(*T).Run
	/home/travis/.gimme/versions/go1.7.linux.amd64/src/testing/testing.go:646 +0x530
exit status 2
FAIL	github.com/uber/cherami-server/test/integration	260.724s

[coveralls]

Coverage decreased (-0.7%) to 67.933% when pulling a3bed6e on disable-TestQueueDepth into 52b828e on master.