Use testcontainers to test MongoDB stuff

[jiangpengcheng]

Description

Use testcontainers for testing mongodb just like elasticsearch, hope this can fix cron build error of master too

Related issue and scope

• I opened an issue to propose and discuss this change (#????)

My changes affect the following components

• API
• Controller
• Message Bus (e.g., Kafka)
• Loadbalancer
• Scheduler
• Invoker
• Intrinsic actions (e.g., sequences, conductors)
• Data stores (e.g., CouchDB)
• Tests
• Deployment
• CLI
• General tooling
• Documentation

Types of changes

• Bug fix (generally a non-breaking change which closes an issue).
• Enhancement or new feature (adds new functionality).
• Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• I signed an Apache CLA.
• I reviewed the style guides and followed the recommendations (Travis CI will check :).
• I added tests to cover my changes.
• My changes require further changes to the documentation.
• I updated the documentation where necessary.

[codecov-commenter]

Codecov Report

Merging #5234 (8bcbad0) into master (37f1f99) will increase coverage by 36.99%.
The diff coverage is 40.00%.

@@             Coverage Diff             @@
##           master    #5234       +/-   ##
===========================================
+ Coverage   26.29%   63.29%   +36.99%     
===========================================
  Files         238      238               
  Lines       13965    13965               
  Branches      576      578        +2     
===========================================
+ Hits         3672     8839     +5167     
+ Misses      10293     5126     -5167     

Impacted Files	Coverage Δ
...whisk/connector/kafka/KafkaProducerConnector.scala	26.82% <0.00%> (-33.18%)	⬇️
...apache/openwhisk/connector/lean/LeanProducer.scala	0.00% <0.00%> (ø)
.../org/apache/openwhisk/core/connector/Message.scala	65.97% <ø> (+23.71%)	⬆️
.../openwhisk/core/loadBalancer/FPCPoolBalancer.scala	0.00% <0.00%> (ø)
...enwhisk/core/loadBalancer/InvokerSupervision.scala	90.27% <0.00%> (+90.27%)	⬆️
...e/loadBalancer/ShardingContainerPoolBalancer.scala	78.53% <ø> (+78.53%)	⬆️
...ontainerpool/v2/FunctionPullingContainerPool.scala	80.32% <ø> (+80.32%)	⬆️
...nwhisk/core/invoker/ContainerMessageConsumer.scala	78.72% <ø> (+78.72%)	⬆️
...he/openwhisk/core/invoker/FPCInvokerReactive.scala	0.00% <ø> (ø)
...sk/core/scheduler/container/ContainerManager.scala	0.00% <0.00%> (ø)
... and 168 more

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[ningyougang]

LGTM