svc add host mapping view

[tanjiangyu-ghca]

What this PR does / why we need it:

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 #422 (4a08d29) into svc_host (a9c31b5) will increase coverage by 0.06%.
The diff coverage is 85.71%.

@@             Coverage Diff              @@
##           svc_host     #422      +/-   ##
============================================
+ Coverage     70.56%   70.63%   +0.06%     
============================================
  Files           174      180       +6     
  Lines         17998    18729     +731     
  Branches       2648     2763     +115     
============================================
+ Hits          12701    13229     +528     
- Misses         4507     4656     +149     
- Partials        790      844      +54     

Impacted Files	Coverage Δ
delfin/drivers/ibm/storwize_svc/ssh_handler.py	74.25% <84.70%> (+1.36%)	⬆️
delfin/drivers/ibm/storwize_svc/storwize_svc.py	88.00% <100.00%> (+1.63%)	⬆️
delfin/drivers/fake_storage/__init__.py	94.40% <0.00%> (-0.95%)	⬇️
delfin/drivers/dell_emc/vplex/vplex_stor.py	80.00% <0.00%> (-0.94%)	⬇️
delfin/task_manager/tasks/resources.py	85.84% <0.00%> (-0.90%)	⬇️
delfin/drivers/netapp/dataontap/netapp_handler.py	65.62% <0.00%> (-0.49%)	⬇️
delfin/db/sqlalchemy/models.py	99.66% <0.00%> (-0.01%)	⬇️
delfin/drivers/driver.py	61.76% <0.00%> (ø)
delfin/api/v1/masking_views.py	57.14% <0.00%> (ø)
delfin/drivers/ibm/ds8k/ds8k.py	76.38% <0.00%> (ø)
... and 6 more