Support remote images with registry host:port

[atemate]

The newest version of neuro-API 19.7.26 broke platform-monitoring: neuro-inc/platform-monitoring#70

The problem was that if registry_url contains both host and port, still _ImageNameParser._registry will contain only host part. Thus, parser _container_from_api, used to parse the response for Jobs.run, will try to parse an image like localhost:5000/user/ubuntu:latest as a local image not as remote (because it does not start with localhost/ but starts with localhost:5000/).

Note: one test is still xfailed due to #938
(it fails with a wrong message)

[asvetlov]

Hmm.
localhost:5000/user/ubuntu:latest is an URL with localhost scheme.
I'm sure that it is not what you want.
Correct URL should be either https://localhost:5000/user/ubuntu:latest or //localhost:5000/user/ubuntu:latest if you want to omit scheme.

Otherwise the parser is ambiguous.

[atemate]

thank you @asvetlov for your idea with //localhost:5000/user/ubuntu:latest! simplified the code.

[codecov]

Codecov Report

Merging #939 into master will increase coverage by 0.1%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #939     +/-   ##
=========================================
+ Coverage   91.92%   92.03%   +0.1%     
=========================================
  Files          37       37             
  Lines        4209     4216      +7     
  Branches      634      636      +2     
=========================================
+ Hits         3869     3880     +11     
+ Misses        230      227      -3     
+ Partials      110      109      -1

Impacted Files	Coverage Δ
neuromation/api/parsing_utils.py	100% <100%> (ø)	⬆️
neuromation/cli/main.py	69.8% <0%> (+1.98%)	⬆️

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[atemate]

class method, IMO it's better to use class name here

[asvetlov]

Please add changenote

[atemate]

I will add the changelog message to the second PR that resolves this issue: #940