renamed func to restcall for the sake of clean code and better unders…

[milanchandna]

…tanding

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This checklist is used to make sure that common guidelines for a pull request are followed.

Description of the change

General Guidelines

• The PR has modified HISTORY.rst with an appropriate description of the change and a version increment.
• The PR has supporting test coverage that confirm the expected behavior and protects against regressions, including necessary recordings.
• Links to associated bugs, if any, are in the description.

[coveralls]

Coverage decreased (-0.4%) to 83.803% when pulling 3c9cff8 on milanchandna:renamed-restcall into d18e47d on Azure:master.