Standardize logging formats and add more logging

[cheehongw]

Summary:

Standardize logging formats and add more logging

Changes Made:

• Renamed all instances of loggingService to logger
• Update the format of logging messages to follow codefile: action
• Add logging messages for requests and responses, and for signing the user out.

Proposed Commit Message:

Standardize logging formats and add more logging.

Let's specify where log statements are being generated, and add more 
logging statements to aid in diagnostics.

[codecov-commenter]

Codecov Report

Base: 53.58% // Head: 53.42% // Decreases project coverage by -0.16% ⚠️

Coverage data is based on head (2a840ac) compared to base (8e9595f).
Patch coverage: 36.36% of modified lines in pull request are covered.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1147      +/-   ##
==========================================
- Coverage   53.58%   53.42%   -0.16%     
==========================================
  Files         100      100              
  Lines        2721     2727       +6     
  Branches      512      512              
==========================================
- Hits         1458     1457       -1     
- Misses        926      931       +5     
- Partials      337      339       +2     

Impacted Files	Coverage Δ
...h/session-selection/session-selection.component.ts	39.53% <0.00%> (ø)
src/app/core/services/auth.service.ts	13.15% <0.00%> (-0.55%)	⬇️
src/app/core/services/github.service.ts	16.19% <ø> (-0.12%)	⬇️
src/app/core/services/issue.service.ts	8.85% <0.00%> (ø)
.../shared/comment-editor/comment-editor.component.ts	18.66% <ø> (ø)
.../app/shared/issue-tables/issue-tables.component.ts	37.37% <25.00%> (ø)
src/app/core/services/error-handling.service.ts	64.28% <100.00%> (ø)
src/app/core/services/user.service.ts	75.60% <100.00%> (-1.32%)	⬇️
src/app/shared/issue-tables/issue-sorter.ts	36.36% <0.00%> (-9.10%)	⬇️
... and 2 more

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[vigneshsankariyer1234567890]

LGTM!