Online execution of sample apps: improvements (#1196)

[deining]

Changes as requested here.

[codecov-commenter]

Codecov Report

Merging #1199 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #1199   +/-   ##
=========================================
  Coverage     94.30%   94.30%           
  Complexity      455      455           
=========================================
  Files             2        2           
  Lines          6674     6674           
  Branches       1794     1794           
=========================================
  Hits           6294     6294           
  Misses          102      102           
  Partials        278      278           

---

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 b5d05e6...097833d. Read the comment docs.

[remkop]

Looks like I made some changes that caused conflicts, so I added your proposed changes manually.
Thanks, I had forgotten about the Kotlin and Scala examples!