fix issue-314 by checking zookeeperCluster resource version before updating sts

[srteam2020]

Change log description

The PR makes the following changes:

• label the current RV of the zookeeperCluster to the sts when creation
• check whether the current RV of the zookeeperCluster is larger than the RV labeled to the sts before updating the sts

Purpose of the change

Fixes #314

[codecov-commenter]

Codecov Report

Merging #326 (78718d8) into master (a99c93b) will decrease coverage by 0.77%.
The diff coverage is 27.77%.

@@            Coverage Diff             @@
##           master     #326      +/-   ##
==========================================
- Coverage   84.67%   83.90%   -0.78%     
==========================================
  Files          11       11              
  Lines        1312     1330      +18     
==========================================
+ Hits         1111     1116       +5     
- Misses        133      145      +12     
- Partials       68       69       +1     

Impacted Files	Coverage Δ
...er/zookeepercluster/zookeepercluster_controller.go	59.39% <27.77%> (-1.28%)	⬇️

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[anishakj]

@srteam2020 Thanks for raising PR, Could you please add unit tests to increase the test coverage for the new function added?

[srteam2020]

@anishakj Thanks for the reply! I will add an unit test for the newly added function and push again later.

[anishakj]

@anishakj Thanks for the reply! I will add an unit test for the newly added function and push again later.

@srteam2020 Any updates on adding unit tests?

[srteam2020]

Hi @anishakj I was busy on some ddls these two weeks. I will work on it this weekend.

[anishakj]

LGTM