fix(sanity): fixing flaky sanity test case

[pawanpraka1]

flaky sanity fix and updated the docker image to 18.04 for github action, missed adding this in the PR #255.

Signed-off-by: Pawan pawan@mayadata.io

[prateekpandey14]

Lgtm, even we can think of moving to ubuntu 20.04 which more optimized container image in coming future ?

[pawanpraka1]

@prateekpandey14 we did that and faced mount related issue with 20,04 so reverted back to 19.10. If that is stable, we can move to it.

[codecov-io]

Codecov Report

Merging #256 (22764e3) into master (2ae14f5) will decrease coverage by 0.09%.
The diff coverage is 0.00%.

@@            Coverage Diff            @@
##           master    #256      +/-   ##
=========================================
- Coverage    7.80%   7.70%   -0.10%     
=========================================
  Files          20      20              
  Lines        1141    1155      +14     
=========================================
  Hits           89      89              
- Misses       1051    1065      +14     
  Partials        1       1              

Impacted Files	Coverage Δ
pkg/driver/controller.go	0.64% <0.00%> (-0.03%)	⬇️

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