add appRevisionNum for context in CUE Template

[yangsoon]

Add appRevisionNum field for context.

appRevisionNum represents the revision number(int type) of the application, e.g., context.appRevisionNum stands for 1 in appRevision app-v1

[codecov]

Codecov Report

Merging #1466 (6a7f626) into master (2254777) will increase coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1466      +/-   ##
==========================================
+ Coverage   53.17%   53.27%   +0.09%     
==========================================
  Files          83       83              
  Lines        8175     8179       +4     
==========================================
+ Hits         4347     4357      +10     
+ Misses       3307     3303       -4     
+ Partials      521      519       -2     

Flag	Coverage Δ
unittests	53.27% <100.00%> (+0.09%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/dsl/process/handle.go	77.41% <100.00%> (+1.55%)	⬆️
...plicationconfiguration/applicationconfiguration.go	83.63% <0.00%> (+0.60%)	⬆️
...aits/traitdefinition/traitdefinition_controller.go	81.39% <0.00%> (+9.30%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2254777...6a7f626. Read the comment docs.