Unity: Detach host with retry

[yong-huang]

No description provided.

[codecov]

Codecov Report

Merging #346 (895b7b2) into master (cedad6a) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #346      +/-   ##
==========================================
- Coverage   91.88%   91.87%   -0.01%     
==========================================
  Files         103      103              
  Lines       14140    14150      +10     
  Branches     1710     1711       +1     
==========================================
+ Hits        12992    13001       +9     
- Misses        736      739       +3     
+ Partials      412      410       -2     

Impacted Files	Coverage Δ
storops/exception.py	97.46% <100.00%> (+<0.01%)	⬆️
storops/unity/resource/host.py	89.91% <100.00%> (+0.51%)	⬆️
storops/connection/connector.py	47.82% <0.00%> (-3.48%)	⬇️
storops/vnx/navi_command.py	86.42% <0.00%> (+1.42%)	⬆️

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