Protocol error handler

[oldfly]

Bug fix referring #66

Fixs in local file system, AWS S3 bucket, Hadoop file system.

For tests:

Run Pipeline action first, copy the result protocol, pass it wrong in Predictor Preparation action.
Engine executor should show error log with message like: "Invalid protocol: pipeline_336a66ca-4969-4e6e-a30d-b7756dd148d, reload action canceled!"

Pass the same protocol again correctly, and perform Predict action, the Predictor should be able to do your job instead of showing error message.

For AWS S3 test, set artifactManagerType in engine metadata to "S3", add s3BucketName key, and don't forget to set environment variables:
AWS_ACCESS_KEY_ID,
AWS_SECRET_ACCESS_KEY,
AWS_DEFAULT_REGION

For Hadoop test, set artifactManagerType to "HDFS", add hdfsHost key, and don't forget to set environment variables:
HADOOP_CONF_DIR

[codecov-io]

Codecov Report

Merging #67 into master will decrease coverage by 1.72%.
The diff coverage is 24.24%.

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
- Coverage   79.72%   77.99%   -1.73%     
==========================================
  Files          22       22              
  Lines         651      668      +17     
  Branches       25       39      +14     
==========================================
+ Hits          519      521       +2     
- Misses        132      147      +15

Impacted Files	Coverage Δ
...rg/marvin/artifact/manager/ArtifactHdfsSaver.scala	0% <0%> (ø)	⬆️
.../org/marvin/artifact/manager/ArtifactFSSaver.scala	8.69% <0%> (-2.42%)	⬇️
.../org/marvin/artifact/manager/ArtifactS3Saver.scala	77.41% <66.66%> (-10.59%)	⬇️

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