avoid self role revoke in conferences.#1751

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lakadbagha wants to merge 2 commits intoigniterealtime:4.6from lakadbagha:4.6

+40-33

Commits on Oct 19, 2020

- fixed bug to revoke self role from conference.
deepak
committed

Commits on Nov 6, 2020

- fixed bug to revoke own role from conference.
deepak
committed