Override email privacy using notification service token

[sbose78]

Partially fixes fabric8-services/fabric8-notification#52

TODO

• Add tests
• Update GET /api/users/<ID> API

How to test

1. Get service account token:

curl --request POST   -d "grant_type=client_credentials&client_id=4c34f6d4-f00b-487b-9a1f-e7d1adba6866&client_secret=secret"  --url http://localhost:8089/api/token  

2. Pass token in the request

curl --header "authorization: bearer $token" http://localhost:8089/api/users/7587730b-a4c0-4023-aa3a-dde91a3f5fd5

[fabric8cd]

@sbose78 snapshot fabric8-auth image is available for testing. docker pull docker.io/fabric8/fabric8-auth:SNAPSHOT-PR-252-1

[codecov]

Codecov Report

Merging #252 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #252      +/-   ##
==========================================
+ Coverage   47.97%   47.97%   +<.01%     
==========================================
  Files          67       67              
  Lines        6750     6751       +1     
==========================================
+ Hits         3238     3239       +1     
  Misses       3226     3226              
  Partials      286      286

Impacted Files	Coverage Δ
controller/users.go	74.02% <100%> (+0.04%)	⬆️
configuration/configuration.go	77.23% <0%> (ø)	⬆️

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[fabric8cd]

@sbose78 snapshot fabric8-auth image is available for testing. docker pull docker.io/fabric8/fabric8-auth:SNAPSHOT-PR-252-2

[fabric8cd]

@sbose78 snapshot fabric8-auth image is available for testing. docker pull docker.io/fabric8/fabric8-auth:SNAPSHOT-PR-252-3

[alexeykazakov]

I simplified our default secrets for SAs a bit. And I also added them to the comment in configuration.go so we don't have to guess what secrets we used to generate the hashes ;)

[sbose78]

Excellent, thank you very much @alexeykazakov :D