Documentation on symbols in test classes

[kentr0w]

What's done:

Added handle for Test annotation
closes #217

[codecov]

Codecov Report

Merging #271 into master will decrease coverage by 0.18%.
The diff coverage is 61.53%.

@@             Coverage Diff              @@
##             master     #271      +/-   ##
============================================
- Coverage     81.41%   81.23%   -0.19%     
  Complexity      956      956              
============================================
  Files            50       50              
  Lines          2508     2510       +2     
  Branches        780      782       +2     
============================================
- Hits           2042     2039       -3     
- Misses          184      190       +6     
+ Partials        282      281       -1     

Flag	Coverage Δ	Complexity Δ
#unittests	81.23% <61.53%> (-0.19%)	956.00 <0.00> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ	Complexity Δ
...fn/diktat/common/config/rules/RulesConfigReader.kt	42.85% <0.00%> (-11.69%)	4.00 <0.00> (ø)
...g/cqfn/diktat/ruleset/utils/FunctonASTNodeUtils.kt	70.37% <ø> (-2.13%)	0.00 <0.00> (ø)
...tlin/org/cqfn/diktat/ruleset/utils/AstNodeUtils.kt	83.52% <72.72%> (-0.72%)	0.00 <0.00> (ø)
...org/cqfn/diktat/ruleset/rules/kdoc/KdocComments.kt	91.66% <83.33%> (-3.58%)	15.00 <0.00> (+1.00)	⬇️
...lin/org/cqfn/diktat/ruleset/rules/PackageNaming.kt	92.68% <100.00%> (+1.01%)	30.00 <0.00> (ø)
.../org/cqfn/diktat/ruleset/rules/kdoc/KdocMethods.kt	89.24% <100.00%> (+0.70%)	69.00 <0.00> (-1.00)	⬆️

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[petertrr]

Please also fix issues found by analysis in diktat check (mostly documentation to your newly added class)

[petertrr]

LGTM