fix e2e test for hns bucket

[Tulsishah]

Description

1. Increase the timeout for the storage client, as operations tests often run for more than 15 minutes.
2. The HNS function process was running in the foreground, so we were unable to obtain a process ID and therefore couldn't get the correct exit code.

Link to the issue in case of a bug fix.

NA

Testing details

1. Manual - NA
2. Unit tests - NA
3. Integration tests - Automated

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.59%. Comparing base (70b6407) to head (8627c6a).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2020      +/-   ##
==========================================
+ Coverage   71.56%   71.59%   +0.02%     
==========================================
  Files          97       97              
  Lines       10705    10705              
==========================================
+ Hits         7661     7664       +3     
+ Misses       2703     2700       -3     
  Partials      341      341              

Flag	Coverage Δ
unittests	71.59% <ø> (+0.02%)	⬆️

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