Application name

[red-avtovo]

Added application name capability to be able to get exact node from Selenium Grid.

According to Selenium implementation, selenium doesn't use application name. On other hand,
user can use this parameter in capabilities to identify node and then request it from Grid,
by adding it to desiredCapability

[codecov-io]

Codecov Report

Merging #54 into release-1.0 will increase coverage by 0.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##           release-1.0   #54      +/-   ##
============================================
+ Coverage        98.98%   99%   +0.01%     
============================================
  Files                2     2              
  Lines               99   100       +1     
============================================
+ Hits                98    99       +1     
  Misses               1     1

Impacted Files	Coverage Δ
src/app.py	98.94% <100%> (+0.01%)	⬆️

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[budtmo]

Hi @red-avtovo ,

Thank you for the PR. Could you also maybe explain it in readme and update docker-compose and sample test scripts? so users know about it. and I will change the target branch to release-1.0. I just want to let you know.