unity change ethport's logictype and THROUGHPUT'units as Ki

[tanjiangyu-ghca]

What this PR does / why we need it:
unity change ethport's logictype and THROUGHPUT'units as Ki

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #

Special notes for your reviewer:

Release note:

[codecov]

Codecov Report

Merging #999 (1d1ab3f) into master (f2765e1) will increase coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #999      +/-   ##
==========================================
+ Coverage   70.83%   70.85%   +0.01%     
==========================================
  Files         195      195              
  Lines       23987    23994       +7     
  Branches     3674     3677       +3     
==========================================
+ Hits        16991    17000       +9     
+ Misses       5831     5830       -1     
+ Partials     1165     1164       -1     

Impacted Files	Coverage Δ
delfin/drivers/dell_emc/unity/rest_handler.py	44.66% <ø> (ø)
delfin/drivers/dell_emc/unity/consts.py	100.00% <100.00%> (ø)
delfin/drivers/dell_emc/unity/unity.py	68.38% <100.00%> (+0.57%)	⬆️
delfin/drivers/ibm/storwize_svc/ssh_handler.py	74.15% <100.00%> (ø)

[JiuyunZhao]

LGTM