Apply resources formatting

[shagren]

Formatter for Job(container) resources, issue #319
Result will be like:

Resources
  Memory: 1024 MB
  CPU: 2.0
  GPU: 1.0 x nvidia-tesla-p4
  Additional: Extended SHM space

Not sure can GPU number be float? Like as we havent any docs about that.
Also do we need to use other that "MB" suffixes for Memory?

[codecov]

Codecov Report

Merging #328 into master will increase coverage by 0.05%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #328      +/-   ##
==========================================
+ Coverage   95.19%   95.24%   +0.05%     
==========================================
  Files          22       22              
  Lines        1227     1242      +15     
==========================================
+ Hits         1168     1183      +15     
  Misses         59       59

Impacted Files	Coverage Δ
python/neuromation/cli/formatter.py	100% <100%> (ø)	⬆️

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[asvetlov]

Currently, the format is not good but it fits into the single line.
Would you refactor the output like:

Resources: memory: 1024 MB, CPU: 2.0, GPU: 1.0 x nvidia-tesla-p4, SHM: yes

[shagren]

@asvetlov refactored as discussed via slack