Change default UI execution timeout to 100 days and also update UI Document with missing config values

[codewithaloknath]

Software Environment:

• OpenLooKeng version (source or binary):
  1.6

• Java version:

Describe the current behavior

Few config variable details are missing in UI Document.
UI execution timeout is set 1 day.

Describe the expected behavior

Added the details of missing config variables in the UI document.
UI execution timeout should be set to 100days