DaemonSetJob: implement jobTemplate update

[clamoriniere1A]

Issue: #71

• Add JobSpec md5 hash in Job annotation.
• Add more unit-tests for daemonsetjobcontroller.Sync method
• Add end2end test for DaemonSetJob

[codecov-io]

Codecov Report

Merging #78 into master will increase coverage by 4.33%. The diff coverage is 40.9%.

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
+ Coverage   29.79%   34.13%   +4.33%     
==========================================
  Files          17       17              
  Lines        1638     1673      +35     
==========================================
+ Hits          488      571      +83     
+ Misses       1114     1056      -58     
- Partials       36       46      +10

Impacted Files	Coverage Δ
pkg/controller/controller_util.go	45.83% <100%> (+8.33%)	:arrow_up:
pkg/controller/common.go	23.52% <100%> (+23.52%)	:arrow_up:
pkg/controller/job_control.go	10.93% <33.33%> (+10.93%)	:arrow_up:
pkg/controller/daemonsetjob.go	48.26% <33.33%> (+14.93%)	:arrow_up:

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[clamoriniere1A]

@sdminonne let me know if you have others remarks after my changes

[sdminonne]

May be 30s is not enough :)

[sdminonne]

thanks!