rename rpm/deb artifact name

[ylwu-amzn]

Issue #, if available:

Description of changes:

Rename artifact name for rpm and deb

Test

./gradlew buildPackages

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[codecov]

Codecov Report

Merging #371 (c4097f5) into master (8230412) will increase coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #371      +/-   ##
============================================
+ Coverage     78.88%   78.93%   +0.04%     
  Complexity     2653     2653              
============================================
  Files           247      247              
  Lines         11719    11719              
  Branches       1009     1009              
============================================
+ Hits           9245     9250       +5     
+ Misses         1996     1992       -4     
+ Partials        478      477       -1     

Flag	Coverage Δ	Complexity Δ
cli	79.27% <ø> (ø)	0.00 <ø> (ø)
plugin	78.90% <ø> (+0.04%)	0.00 <ø> (ø)

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

Impacted Files	Coverage Δ	Complexity Δ
...pendistroforelasticsearch/ad/cluster/HashRing.java	78.94% <0.00%> (-5.27%)	10.00% <0.00%> (-1.00%)
...troforelasticsearch/ad/task/ADBatchTaskRunner.java	87.82% <0.00%> (-0.87%)	63.00% <0.00%> (-1.00%)
...asticsearch/ad/cluster/ADClusterEventListener.java	94.00% <0.00%> (+2.00%)	15.00% <0.00%> (+1.00%)
...stroforelasticsearch/ad/AnomalyDetectorRunner.java	46.25% <0.00%> (+6.25%)	7.00% <0.00%> (+1.00%)
...port/SearchAnomalyDetectorInfoTransportAction.java	63.63% <0.00%> (+9.09%)	4.00% <0.00%> (ø%)

[yizheliu-amazon]

just curious: is last step delete needed? I guess the original file is renamed so that it won't exist any more, not sure what's the behavior in gradle rename.