Add hotrod in release and push all tags

[Ashmita152]

Signed-off-by: Ashmita Bohara [email protected]

Which problem is this PR solving?

Closes #2810

Short description of the changes

• We were running older version of docker in travis which used to push all tags of an image on doing docker push image.
  Newer version of docker needs --all-tags flag for achieving that.
• Added the missing hotrod build as part of release process.
• Removed scripts used in travis and no longer used.
• Removed all travis references.

[codecov]

Codecov Report

Merging #2812 (447e6c0) into master (c8b8168) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2812      +/-   ##
==========================================
- Coverage   95.96%   95.95%   -0.02%     
==========================================
  Files         218      218              
  Lines        9620     9620              
==========================================
- Hits         9232     9231       -1     
- Misses        321      322       +1     
  Partials       67       67              

Impacted Files	Coverage Δ
plugin/storage/integration/integration.go	77.34% <0.00%> (-0.56%)	⬇️

---

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 c8b8168...387ade5. Read the comment docs.

[yurishkuro]

Thanks for that rename! 😁