User/jf/remove old complete status file

[feng-j678]

[x] add logic to remove old complete status file in status folder
[x] refactor json.loads(message) in load_status_file_components()
[x] add unit test for remove old complete status file()

[rane-rajasi]

Comments inline

[codecov]

Codecov Report

Merging #205 (7543faf) into master (dae984a) will increase coverage by 0.04%.
The diff coverage is 98.46%.

@@            Coverage Diff             @@
##           master     #205      +/-   ##
==========================================
+ Coverage   90.19%   90.23%   +0.04%     
==========================================
  Files          90       90              
  Lines       14483    14533      +50     
==========================================
+ Hits        13063    13114      +51     
+ Misses       1420     1419       -1     

Flag	Coverage Δ
python27	90.23% <98.46%> (+0.04%)	⬆️
python39	90.23% <98.46%> (+0.04%)	⬆️

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

Files Changed	Coverage Δ
src/core/src/service_interfaces/StatusHandler.py	94.80% <96.29%> (+0.40%)	⬆️
src/core/src/bootstrap/Constants.py	98.59% <100.00%> (+<0.01%)	⬆️
src/core/tests/Test_StatusHandler.py	99.77% <100.00%> (+0.01%)	⬆️

[kjohn-msft]

Please review the comment inline with @rane-rajasi

[rane-rajasi]

Comment inline

[rane-rajasi]

Left minor comments

[rane-rajasi]

@feng-j678 I've left one minor comment. Please do take a look at it before merging

[rane-rajasi]

Reviewed from the extension lifecycle perspective as well, doesn't seem to change any existing functionality or adding orphan files during other handler events (i.e. non-enable)