test_kvstore_gpu.test_row_sparse_pull takes forever to run and causes build failures

[indhub]

Description

test_kvstore_gpu.test_row_sparse_pull takes forever to run and causes build failures

Links to build failures:
https://builds.apache.org/blue/organizations/jenkins/incubator-mxnet/detail/master/516/pipeline
https://builds.apache.org/blue/organizations/jenkins/incubator-mxnet/detail/PR-8244/2/pipeline/
https://builds.apache.org/blue/organizations/jenkins/incubator-mxnet/detail/PR-8246/2/pipeline/288

PR that introduced the change:
#7082

MXNet commit hash:
a05ac49
420f222

Error Message:

[Python3: MKLML-GPU] test_kvstore_gpu.test_row_sparse_pull ... [Pipeline] [Python3: MKLML-GPU] }
[Pipeline] [Python3: MKLML-GPU] // timeout
[Pipeline] [Python3: MKLML-GPU] }
[Pipeline] [Python3: MKLML-GPU] // ws
[Pipeline] [Python3: MKLML-GPU] }
[Pipeline] [Python3: MKLML-GPU] // node
[Pipeline] [Python3: MKLML-GPU] }
[Python3: MKLML-GPU] Failed in branch Python3: MKLML-GPU

Steps to reproduce

Build and run the unit test. Failure seems to happen in Python3: MKLML-GPU.

[eric-haibin-lin]

@indhub could you disable this test for now?

[indhub]

@eric-haibin-lin Done.