Upgrade to NodeJS 10 in CircleCI

[josemigallas]

What this PR does / why we need it:

Porta must support nodeJS 10

Which issue(s) this PR fixes

THREESCALE-4239: Upgrade to NodeJS 10 in CircleCI

system-builder: 3scale/system-builder#17

[hallelujah]

Need to retrigger a build when the new image is built in quay

[codecov]

Codecov Report

Merging #1548 into master will decrease coverage by 1.37%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1548      +/-   ##
==========================================
- Coverage   85.81%   84.43%   -1.38%     
==========================================
  Files        2464     2231     -233     
  Lines       80586    69444   -11142     
==========================================
- Hits        69151    58632   -10519     
+ Misses      11435    10812     -623

Impacted Files	Coverage Δ
lib/tasks/services.rake	56.66% <0%> (-30.84%)	⬇️
.../admin/dashboard/service/top_traffic_controller.rb	71.42% <0%> (-3.58%)	⬇️
...rovider/admin/dashboard/service/hits_controller.rb	50% <0%> (-2.95%)	⬇️
...est/unit/three_scale/swagger/specification_test.rb	97.43% <0%> (-2.57%)	⬇️
...s/provider/admin/cms/email_templates_controller.rb	41.66% <0%> (-0.65%)	⬇️
...ib/developer_portal/lib/liquid/drops/pagination.rb	91.66% <0%> (-0.2%)	⬇️
app/subscribers/after_commit_subscriber.rb	96.42% <0%> (-0.13%)	⬇️
app/models/backend_api.rb	95.08% <0%> (-1.75%)	⬇️
app/models/access_token.rb	94.68% <0%> (-1.16%)	⬇️
app/models/proxy.rb	95.56% <0%> (-1.4%)	⬇️
... and 735 more

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