Moving Preview Anomaly Detectors to Transport layer

[saratvemulapalli]

*Issue #195 *

Description of changes:
Moving Preview API to transport layer

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[codecov]

Codecov Report

Merging #321 (bcf1b51) into master (21418a4) will increase coverage by 0.70%.
The diff coverage is 69.17%.

@@             Coverage Diff              @@
##             master     #321      +/-   ##
============================================
+ Coverage     76.58%   77.28%   +0.70%     
- Complexity     2242     2277      +35     
============================================
  Files           209      214       +5     
  Lines         10173    10242      +69     
  Branches        905      909       +4     
============================================
+ Hits           7791     7916     +125     
+ Misses         1968     1908      -60     
- Partials        414      418       +4     

Flag	Coverage Δ	Complexity Δ
cli	79.27% <ø> (ø)	0.00 <ø> (ø)
plugin	77.13% <69.17%> (+0.75%)	0.00 <29.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...arch/ad/rest/RestPreviewAnomalyDetectorAction.java	15.78% <15.78%> (ø)	4.00 <4.00> (?)
...arch/ad/rest/RestExecuteAnomalyDetectorAction.java	22.50% <16.66%> (+10.68%)	3.00 <0.00> (ø)
...ansport/PreviewAnomalyDetectorTransportAction.java	86.88% <86.88%> (ø)	11.00 <11.00> (?)
...stroforelasticsearch/ad/AnomalyDetectorPlugin.java	95.08% <100.00%> (+0.04%)	11.00 <0.00> (ø)
...rch/ad/transport/PreviewAnomalyDetectorAction.java	100.00% <100.00%> (ø)	2.00 <2.00> (?)
...ch/ad/transport/PreviewAnomalyDetectorRequest.java	100.00% <100.00%> (ø)	8.00 <8.00> (?)
...h/ad/transport/PreviewAnomalyDetectorResponse.java	100.00% <100.00%> (ø)	4.00 <4.00> (?)
...arch/ad/transport/ADStatsNodesTransportAction.java	94.44% <0.00%> (-5.56%)	8.00% <0.00%> (-1.00%)
...port/SearchAnomalyDetectorInfoTransportAction.java	59.09% <0.00%> (-4.55%)	4.00% <0.00%> (ø%)
...asticsearch/ad/cluster/ADClusterEventListener.java	88.00% <0.00%> (-2.00%)	13.00% <0.00%> (-1.00%)
... and 8 more

[kaituo]

Thanks for the change. I know it is not easy.

[saratvemulapalli]

Thanks for the change. I know it is not easy.

No problem, its definitely worth it : )