Add bintray-credentials plug-in to read key(s) from the environment

[romeara]

Encapsulate the multi-module-library behavior of setting up Bintray credentials read from the environment into an independent plug-in. This allows any additional logic associated with this configuration to be encapsulated in a specific place

[codecov[bot]]

Codecov Report

Merging #45 into master will increase coverage by 1.25%. The diff coverage is 88.88%.

@@             Coverage Diff              @@
##             master      #45      +/-   ##
============================================
+ Coverage     84.51%   85.77%   +1.25%     
- Complexity      251      254       +3     
============================================
  Files            25       26       +1     
  Lines           762      766       +4     
  Branches         53       53              
============================================
+ Hits            644      657      +13     
+ Misses           95       85      -10     
- Partials         23       24       +1

Impacted Files	Coverage Δ	Complexity Δ
...flare/plugins/plugin/MultiModuleLibraryPlugin.java	0% <0%> (ø)	0 <0> (ø)	:arrow_down:
...flare/plugins/plugin/BintrayCredentialsPlugin.java	100% <100%> (ø)	2 <2> (?)
...are/plugins/model/EnvironmentCredentialSource.java	42.85% <0%> (+23.8%)	2% <0%> (+1%)	:arrow_up:

[blackduck-copilot[bot]]

Black Duck Security Report

Merging #45 into master will not change security risk.

Click here to see full report