Issue-505: Added changes for Avoiding 2 Restarts when Both Version and cm changes are done at the same time

[Prabhaker24]

Signed-off-by: prabhaker24 [email protected]

Change log description

Added changes for Avoiding 2 Restarts when Both Version and cm changes are done at the same time. This makes the upgrade process fast and we don't get error messages due to race condition.

Purpose of the change

Fixes #505

What the code does

Code checks for any change in the version of the bk cluster when there are changes in cm and if there is change in the version
then we skip restart of pods and only upgrade the cm

How to verify it

Install pravega cluster then upgrade the cluster along with changing some field in the option we should only see one restart of all pravega(controller and ss) pods and the upgrade should complete.

[codecov-io]

Codecov Report

Merging #506 (d37d817) into master (03fca50) will decrease coverage by 0.00%.
The diff coverage is 38.46%.

@@            Coverage Diff             @@
##           master     #506      +/-   ##
==========================================
- Coverage   71.75%   71.75%   -0.01%     
==========================================
  Files          15       15              
  Lines        3449     3456       +7     
==========================================
+ Hits         2475     2480       +5     
- Misses        868      870       +2     
  Partials      106      106              

Impacted Files	Coverage Δ
...roller/pravegacluster/pravegacluster_controller.go	51.63% <38.46%> (+0.27%)	⬆️

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[anishakj]

LGTM