SCB-972 Using Sha1 signature key as UUID of micro service

[little-cui]

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[coveralls]

Coverage decreased (-0.2%) to 62.554% when pulling 16e3882 on little-cui:master into 5a54da2 on apache:master.

[codecov-io]

Codecov Report

Merging #460 into master will decrease coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #460      +/-   ##
==========================================
- Coverage   60.18%   60.16%   -0.02%     
==========================================
  Files         156      156              
  Lines       13414    13415       +1     
==========================================
- Hits         8073     8071       -2     
- Misses       4762     4765       +3     
  Partials      579      579

Impacted Files	Coverage Δ
server/service/microservice.go	71.45% <100%> (+0.05%)	⬆️
server/service/instance.go	68.53% <100%> (+0.19%)	⬆️
pkg/etcdsync/mutex.go	61.29% <0%> (-5.38%)	⬇️
server/service/util/tag_util.go	61.53% <0%> (-3.85%)	⬇️
pkg/util/tree.go	81.25% <0%> (-3.13%)	⬇️
server/service/notification/websocket.go	84.51% <0%> (+0.64%)	⬆️
pkg/util/util.go	67.56% <0%> (+1.35%)	⬆️
server/plugin/pkg/registry/etcd/tracing.go	81.81% <0%> (+9.09%)	⬆️

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[asifdxtreme]

LGTM