Rollback canary based on the deployment progress deadline check

[stefanprodan]

• add ProgressDeadlineSeconds fields to Canary CRD spec
• set progress deadline default value to 60 seconds
• determine if the canary deployment is stuck by checking if there is a MinimumReplicasUnavailable condition and if the last update time exceeds the deadline
• rollback canary if the progress deadline check returns a non retriable error

Fix #9

[codecov-io]

Codecov Report

Merging #10 into master will increase coverage by 2.44%.
The diff coverage is 38.88%.

@@            Coverage Diff             @@
##           master      #10      +/-   ##
==========================================
+ Coverage      43%   45.45%   +2.44%     
==========================================
  Files           6        6              
  Lines         851      880      +29     
==========================================
+ Hits          366      400      +34     
+ Misses        435      425      -10     
- Partials       50       55       +5

Impacted Files	Coverage Δ
pkg/controller/recorder.go	85.71% <100%> (+8.16%)	⬆️
pkg/controller/scheduler.go	26.82% <35.29%> (+11.34%)	⬆️
pkg/controller/deployer.go	58.09% <37.73%> (-2.09%)	⬇️
pkg/controller/controller.go	8.08% <0%> (+2.2%)	⬆️

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