test() : add unit tests for command execution functions in executables_test.go

[adity1raut]

Description

• Add the unit tests for command execution functions in executables_test.go

Fixes #

How Has This Been Tested?

Checklist:

• The title of the PR states what changed and the related issues number (used for the release note).
• Does this PR requires documentation updates?
• I've updated documentation as required by this PR.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas.
• I have tested it for all user roles.
• I have added all the required unit test cases.

Does this PR introduce a breaking change?

[adity1raut]

increse the test coverage by the 50%

[adity1raut]

PTAL @gourishkb @Alokzh