(#166) Refactored some implementations to accept a Login instead of a Session

[llorllale]

This PR:

• Solves DefaultYouTrack.java:25-27: Modify ctor to accept the... #166
• Leaves puzzle for the rest

[codecov]

Codecov Report

Merging #195 into master will increase coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #195      +/-   ##
==========================================
+ Coverage   97.57%   97.63%   +0.06%     
==========================================
  Files          47       48       +1     
  Lines         619      635      +16     
  Branches       28       28              
==========================================
+ Hits          604      620      +16     
  Misses         14       14              
  Partials        1        1

Impacted Files	Coverage Δ
...java/org/llorllale/youtrack/api/DefaultIssues.java	100% <100%> (ø)	⬆️
.../org/llorllale/youtrack/api/XmlUsersOfProject.java	100% <100%> (ø)	⬆️
...rg/llorllale/youtrack/api/UncheckedIoFunction.java	100% <100%> (ø)
...java/org/llorllale/youtrack/api/DefaultFields.java	100% <100%> (ø)	⬆️
...va/org/llorllale/youtrack/api/DefaultProjects.java	100% <100%> (ø)	⬆️
...va/org/llorllale/youtrack/api/DefaultYouTrack.java	100% <100%> (ø)	⬆️
...llale/youtrack/api/DefaultProjectTimeTracking.java	100% <100%> (ø)	⬆️
...in/java/org/llorllale/youtrack/api/XmlProject.java	89.47% <100%> (ø)	⬆️

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